The supermarket sells many foods that have been _________, so it is convenient to feed your stomach．

A.produced

B.stored

C.processed

D.charged

答案及解析： C

解析：

从后一个分句的意思“填饱肚子很方便”可推知前一分句的意思是：超市出售很多制作好的食品。process作动词意为“加工，处理，制作”。