根据以下材料，回答36-40题
The personal grievance provisions of New Zealand's Employment Relations Act 2000 (ERA) prevent an employer from firing an employee without good cause. Instead, dismissals must be justified. Employers must both show cause and act in a procedurally fair way.
Personal grievance were designed to guard the jobs of ordinary workers from "unjustified dismissals". The premise was that the common law of contract lacked sufficient safeguards for workers against arbitrary conduct by management. Long gone are the days when a boss could simply give an employee contractual notice.
But these provisions create difficulties for businesses when applied to highly paid managers and executives. As countless boards and business owners will attest, constraining firms from firing poorly performing, high-earning managers is a handbrake on boosting productivity and overall performance. The difference between C-grade and A-grade managers may very well be the difference between business success or failure. Between preserving the jobs of ordinary workers or losing them. Yet mediocrity is no longer enough to justify a dismissal.
Consequently — and paradoxically – laws introduced to protect the jobs of ordinary workers may be placing those jobs at risk. if not placing jobs at risk, to the extent employment protection laws constrain business owners from dismissing under-performing managers, those laws act as a constraint on firm productivity and therefore on workers' wages. Indeed, in "An International Perspective on New Zealand's Productivity Paradox"(2014), the Productivity Commission singled out the low quality of managerial capabilities as a cause of the country's poor productivity growth record.
Nor are highly paid managers themselves immune from the harm caused by the ERA's unjustified dismissal procedures. Because employment protection laws make it costlier to fire an employee, employers are more cautious about hiring new staff. This makes it harder for the marginal manager to gain employment. And firms pay staff less because firms carry the burden of the employment arrangement going wrong.
Society also suffers from excessive employment protections. Stringent job dismissal regulations adversely affect productivity growth and hamper both prosperity and overall well-being.
Across the Tasman Sea, Australia deals with the unjustified dismissal paradox by excluding employees earning above a specified "high-income threshold" from the protection of its unfair dismissal laws. In New Zealand, a 2016 private members' Bill tried to permit firms and high-income employees to contract out of the unjustified dismissal regime. However, the mechanisms proposed were unwieldy and the Bill was voted down following the change in government later that year.
It can be inferred that the "high-income threshold" in Australia

?

A.has secured managers' earnings?
B.has produced undesired results?
C.is beneficial to business owners?
D.is difficult to put into practice

答案： C

本题解析：

Australia deals with the unjustified dismissal paradox by excluding employees earning above a specified "high-income threshold" from the protection of its unfair dismissal laws.?澳大利亚通过将收入高于特定"高收入门槛"的员工排除在其不公平解雇法的保护之外，来解决这个不公平的解雇悖论，所以这个"高收入门槛"可以保护公司的利益，C正确。

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