TASK DEFINITION: You need to answer a given question containing a blank (_). Your answer must be one of the two objects mentioned in the question, for example "trophy" and "suitcase". Your answer must not contain a word that is not present in the question. Please don't use articles (e.g., the, a) before the answer.
PROBLEM: Rebecca wiped her glasses with a rag and then switched to a tissue, because the _ wasn't getting the job done.

SOLUTION: rag

PROBLEM: The project analyst found a critical error in the business process flow chart, because the _ was observant.

SOLUTION: analyst

PROBLEM: The zoologist was focused on studying the tracks rather than the prints, since the _ were secondary.

SOLUTION:
prints