HELP!!!!!!!!

A student is revising the sentence below:

A younger associate may be able to fill in for Mr. Sully in a pinch, but I'm worried that a substitute may not possess the same business expertise that he does.

Based on the context of this sentence, which is the best synonym for expertise? (4 points)



Sanity: soundness of mind

Wisdom: collected knowledge

Brilliance: exceptional intelligence

Comprehension: understanding; perception