Which choice best describes the underlined words in this sentence?

Question

Red and a strange shade of green were the only colors available.

Underlined is:
Red _____ shade

A- simple subject

B- complete subject

C- compound subject

D- none of the above

I think it is D.

Answer 1

The correct answer is C. compound subject

Answer 2

I disagree.

http://www.chompchomp.com/terms/compoundsubject.htm

Answer 3

Ok, thank you both! :)

Answer 4

You're welcome.