Sentence Correction

During the first nine months of 1979, textbook publishers incurred substantial costs for creating products that, due to a decline in public funding for instructional material, never were sold.

(A) funding for instructional material, never were
(B) funding for instructional material, never was
(C) funding, the instructional material, was never
(D) funding for instructional material, the products were never
(E) funding, they were never

D is wrong for comma . A comma separates two dependent clause , but In D the clause is independent

IMO A

thks for the reply..

never were sold sounds incorrect can u explain how A is the correct sentence

IMO A

OA??

A is the correct answer as ,"were" is used for "products"

Is it correct to use ".... products that never were sold''

or

it should be ''... products that were never sold''

In the original sentence "products that, due to a decline in public funding for instructional material, never were sold"

As the above sentence already uses "product " once, so using it twice would be incorrect