(单选题)

Why the study said people are "Exhausted But Unable to Disconnect"? ( ).

A.cause they never know what kind of work requests will be asked off hours.
B. Because they are required by the company to answer emails off hours.

B.Because smart phones and tablets keep us connected all the time.

C.None of above.

参考答案：A

参考解析：

从第四段第三行Colorado State University's Samantha Conroy shows that employees are growing exhausted by the expectation that they will always be available, never knowing what kind of work requests will be asked of them off hours可得知A是符合的，BCD项皆没有在这一段前后提到。故本题正确答案选A。

知识点：细节题英语阅读理解通用英语