The Stirling engine is not a photovoltaic system, in which sunlight excites electrons in a semiconductor to generate electricity; rather a parabolic dish that concentrates solar power, generating heat that is converted to grid-quality electricity.


(A) electricity; rather

(B) electricity, but rather

(C) electricity, but rather that of

(D) electricity, but that of

(E) electricity; it is that of

OA is B

i will agree with option B to some extent but i would love an explaination from an expert on why C is not correct.