If a writer wished to indicate that a character wasn't what he or she appeared to be, which of these sentences would be most appropriate for this purpose?

A Kevin didn't always play well at shortstop.

B Kevin and Bill played on the same team in Little League.

C Bill smiled most of the time, but there was often pain in his eyes.

D When he played catch with his friend, Kevin always liked to talk about last night's game.

C Bill smiled most of the time, but there was often pain in his eyes.