这里为什么用is 而不是are？

Question

In some families, the bread and milk ___ forbreakfast.
A. serves
B. are served
C. is served
D. get served

答案是C 我选了B
请大人分析 谢谢

Answer 1

因为这里bread and milk(面包和牛奶）为一类食品，故用单数 is本回答被提问者采纳

Answer 2

同意“因为这里bread and milk(面包和牛奶）为一类食品，故用单数 is ”的说法。

Answer 3

因为bread and milk 是不可数名字

Answer 4

bread和milk不可数

Answer 5

bread and milk are uncountable nouns.!!!!!!!