According to the passage, a "hygiene factor" (highlight text) is an aspect of a worker's performance that

Which of the following, if true, would most clearly have supported the conclusion referred to in highlight text?

It can be inferred that the author of the passage discusses "unmonitored workers" (highlight text) primarily in order to

According to the passage, before the final results of the study were known, which of the following seemed likely?

The passage most clearly implies which of the following about the professional service firms mentioned in the highlighted text

Which of the following hypothetical situations best exemplifies the potential problem noted in the second sentence of the second paragraph (highlight text)?

The passage's description of the issue raised by unconditional guarantees for health care or legal services most clearly implies that which of the following is true?

Which of the following is cited in the passage as a goal of some professional service firms in offering unconditional guarantees of satisfaction?

All of the following are mentioned in the passage as circumstances in which professional service firms can benefit from offering an unconditional guarantee EXCEPT：

The primary function of the passage as a whole is to