Sentence Correction

The market for recycled [u]commodities like aluminum and other metals remain[/u]strong despite economic changes in the recycling industry.

A. commodities like aluminum and other metals remain
B. commodities like those of aluminum and other metals are remaining
C. commodities such as aluminum and other metals remains
D. commodities, such as aluminum and other metals, remain
E. commodities, like the commodities of aluminum and other metals, remains

Ans is E .. my question is why not A?

Rajani wrote:The market for recycled commodities like aluminum and other metals remainstrong despite economic changes in the recycling industry.

A. commodities like aluminum and other metals remain
B. commodities like those of aluminum and other metals are remaining
C. commodities such as aluminum and other metals remains
D. commodities, such as aluminum and other metals, remain
E. commodities, like the commodities of aluminum and other metals, remains

Ans is E .. my question is why not A?

Because..... except E, no choice compares 'commodity' with another commodity. A has subject-verb agreement problem too.

The market for recycled commodities like aluminum and other metals remain strong despite economic changes in the recycling industry.

The market => Singular
Verb => Remains

Now my question here:

C. commodities such as aluminum and other metals remains

"Such as" used to give example, so are we not giving an example here?
Moreover, Aluminium is itself a commodity so is there any need to state commodity again as in E

IMO-C

I doubt the OA

IMO C

agree with gmat740. It should be such as...