Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

A company plans to hire additional factory employees. In the short run, marginal returns are most likely to decrease if:
Option A:the factory is operating at full capacity.
Option B:the factory is experiencing a labor shortage.
Option C:workers are required to multitask and share duties.

Answer: A