GMAT Critical Reasoning (CR) | Which of the following best completes the passage below?

Which of the following best completes the passage below?

In a survey of job applicants, two-fifths admitted to being at least a little dishonest. However, the survey may underestimate the proportion of job applicants who are dishonest, because______

A) some dishonest people taking the survey might have claimed on the survey to be honest
B) some generally honest people taking the survey might have claimed on the survey to be dishonest
C) some people who claimed on the survey to be at least a little
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