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?

Responses
A Kevin didn't always play well at shortstop.Kevin didn't always play well at shortstop.
B Kevin and Bill played on the same team in Little League.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.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.