参考答案

正确答案：C
解析：proliferation 意为“激增：扩散”如：proliferation of nuclear arms 核武器扩散；innovation 意为“革新，创新”如：“The innovation of air travel daring this century has made the world seem smaller.”；selection 意为“选择；选拔”；conviction 意为“定罪，判罪”，如："This was his third conviction.”