Which of the following sentences expresses a possibility?

A、 Any police officer can insist on seeing a driver's license.
B、 You can't expect the world to change overnight.
C、 I am confident that a solution can be found.
D、 Gabriella can speak French fluently.

【正确答案】 C

【答案解析】解析：考查情态动词can的用法。A“任何警察都有权坚持看司机的驾照”，can表示“有权做某事”；B“你不能期望全世界一夜全改变”，can't表示“不应该做某事”；C“我很确信能找到一种解决方案”，can表示“可能性”。D“Gabriella可以流利地讲英语”，can表示一种能力。因此选C。