PLEASE HELP!

Based on this entry, which of the following sentences most accurately uses the word pin?

A. On career day, the doctor shared with the class that a large pin on the skin could be removed with the proper
medication.

B. To avoid having to put a negative pin on the students' report cards, the foreign language teacher decided to
give the students another chance on the quiz.

C. Malcolm worked hard on his report, making sure to pin each source with quotation marks.

D. Although the fisherman had forgotten to put the bait on the vessel, he tried to pin his error on his shipmates.