请问下题选哪个
问题描述：
请问下题选哪个
___melamine to milk makes the protein level appear higher ,which has ill effects on children's health if they drink it.
A.Added B.Adding C.Having added D.add
答
B
“（往）牛奶里加三氯氰胺会使牛奶的蛋白质含量显得更高,但是儿童喝了对身体不好.”