Which of the following is not the reason why companies have begun to shift their attention
Which of the following is not the reason why companies have begun to shift their attention on the retention of workforce？
A．the constant improvement of economy in the US.
B．the demand of experienced and well-trained employees.
C．the demonstration of its market strength indicator.
D．the possible lack of workforce in the near future.
请帮忙给出正确答案和分析，谢谢！
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正确答案：C
解析：为细节理解题。根据第1段中"Theseemployersareimprovingand/oraddingperkstopreventanexodusofworkersthatcouldoccurastheeconomycontinuesimproving".可以了解美国经济的持续增长可能会导致员工大量流失，因此选项A是原因之一。根据"Firmsrealizethattheyrequireafoundationofexperienced,trained,andmotivatedworkers".可以了解公司对于经验丰富的员工有一定需求，因此B也是原因之一。根据"Theyalsomaybelookingfurtherdowntheroadwhenseverelaborshortagesareexpectedtoreturn".可以了解D也是其中一个原因。而选项C中indicator一词虽然有所提及，但在原文中只是对于perk一词的说明，而不是原因，故选C。