Final answer:
The primary advantage of the work sampling technique is that it helps employers uncover information about an applicant's personality. Therefore, the correct option is B.
Step-by-step explanation:
The primary advantage of the work sampling technique is that it helps employers uncover information about an applicant's personality (B). Work sampling involves observing a candidate performing job-related tasks or simulations, which can provide insights into their behavioral traits and work style. This technique is considered more reliable than self-reported information or traditional interviews because it allows employers to directly observe candidates' behavior in real-life work scenarios.