(A) Many acids corrode many metals, such as iron and copper, and oxygen itself does the same thing to them.
(B) Like many acids, oxygen itself has a corrosive effect on many metals, such as iron and copper
(C) Oxygen is like many acids in its ability to generate corrosive effect on many metals, such as and copper.
(D) Many metals, such as iron and copper, are corroded by oxygen itself; similarly, they are corroded by many acids.
(E) Corroding many metals, such as iron and copper, is a property of many acids, and, like these acids, of oxygen itself.
The GMAT loves tricky comparisons. For a discussion of these, as well as the OA & OE for this particular question, see:
https://magoosh.com/gmat/2016/challengin ... -the-gmat/
Mike
