608. Researchers have questioned the use of costly and experimental diagnostic tests to identify food allergies, such as milk, that supposedly disrupt normal behavior.

(A) to identify food allergies, such as

(B) to identify food allergies, like

(C) to identify food allergies, such as to

(D) for identifying food allergies, like that of（C）

(E) for identifying food allergies, such as for

俺选A。意思上，语法上都没错阿。

不明白大全注解里为什么要选(C) ，尤其说to前省略了food allergies，意思上不通阿。

请大家帮忙解答哈。

A，milk和 food allergies不是一个意思啊。用such as +名词milk不妥

C， such as （allergies） to milk 对牛奶的过敏

恩明白了，谢谢指点！

之前想当然的把food allergies理解为食物过敏源了。

这里的确应该用to,查到个例句：I have an allergy to penicillin.