Sentence Correction

The total remittance transfers sent across the world from the top three industrial nations in recent years is almost $100 billion annually, according to the Government Budget Office, or roughly the equivalent of those three countries' foreign assistance budget.

A) years is almost $100 billion annually, according to the Government Budget Office, roughly the equivalent of those three countries' foreign assistance budgets.

B) years is almost $100 billion annually, according to the Government Budget Office, or roughly the equivalent of those three countries' foreign assistance budgets.

C) years are almost $100 billion annually, according to the Government Budget Office, or roughly the equivalent of those three countries' foreign assistance budgets.

D) years - almost $100 billion annually - are, according to the Government Budget Office, roughly the equivalent of those three countries' foreign assistance budgets.

E) years, an amount that is almost $100 billion annually, are, according to the Government Budge Office, roughly the equivalent of the foreign assistance budgets of those three countries.

OA : C
Source : Veritas Prep

Non-underlined portion: The total remittance transfers...
total may not serve to modify a plural noun such as transfers.
Ignore this SC.

Any noun modified by total must be SINGULAR:
the total COST of the project
the total NUMBER of students
the total WEIGHT of the structure.