Supply-side economists theorize that large-capital firms find the need to declare bankruptcy more
due to the fact that they become burdened with high operating costs than failure to compete for consumer demand.
Due to vs Because of -
Due to is used to modify nouns whereas Because of is used to modify entire clauses
(A) due to the fact that they become burdened with high operating costs than failure . Incorrect
(B) due to their becoming burdened with high operating costs than to failing . Incorrect
(C) because they become burdened with high operating costs than that they fail - Parallelism issue Incorrect
(D) because they become burdened with high operating costs than because they fail . Correct
(E) because of their becoming burdened with high operating costs than because of their Incorrect - Awkward construction and use of past continuous tense is incorrect .
Answer D