parallelism

[vishnuvl]

I have an issue in understanding parallelism in a particular sentence from MGMAT SC guide. Kindly help me understand that.

'The music company was afraid that the accelerating decline of sales would not be compensated by increased revenue.'

I felt that the 2 modified nouns are not parallel here. I felt that
'acclerating decline in sales' should be paralleld by 'increasing revenues'.

I also understand that such a change would alter the meaning of the sentence.

If the answer is that both are modified nouns and hence are parallel, please confirm whether it is wrong to check for parallelism in the noun modifiers[adjectives].

PS: I have registered my SC guide in a different account[lvishnu87@gmail.com] but it still doesn't allow me to post there in the Strategy Guide sub-forum. So I choose to post it here in the general forum.

thanks,
concept

[pdarun]

Parallellism would be applicable to noun modifiers as well. What were the answer choices here?