It is worth considering what makes “convenience” foods so popular，and better ones of your own.
A. introduces
B. to introduce
C. introducing
D. introduced
网友回答
A. introduces
B. to introduce
(答案→)C. introducing
D. introduced
解析：句意：什么使快餐饭如此受欢迎值得考虑，也值得引进自己更好的食物。it是形式主语considering ...and introducing...：整段是真正的主语；what makes convenience foods so popular：是considering的宾语从句；introducing 和considering 是并列的，用在worth的后面，表示“值得做”。故选C。