【正确答案】 C

【答案解析】解析：confront vt．使对质，使当面对证：使面临，使遇到；迎面遇到(如：The boy confronted his accuser．Difficulties confront him．be confronted with／by sth．)。encounter vt．遇到，遭遇(encounter an old friend／an enemy;encounter difficulties)。expose(to)vt．揭露，暴露：使处于……的作用(或影响)之下。