It has been estimated that the annual cost to the United States of illiteracy in lost industrial output and tax revenues is at least $20 billion a year.
A. the annual cost of illiteracy to the United States is at least $20 billion a year because of lost industrial output and tax revenues
B. illiteracy costs the United States at least $20 billion a year in lost industrial output and tax revenues.
OA:B
I agree that B sounds better than A.
Also A says "cost of illiteracy" which is sort of ambiguous.. But the OG says that A is wrong because "because of" is the incorrect idiom..
Can anyone explain the OG reasoning ?
A. the annual cost of illiteracy to the United States is at least $20 billion a year because of lost industrial output and tax revenues
B. illiteracy costs the United States at least $20 billion a year in lost industrial output and tax revenues.
OA:B
I agree that B sounds better than A.
Also A says "cost of illiteracy" which is sort of ambiguous.. But the OG says that A is wrong because "because of" is the incorrect idiom..
Can anyone explain the OG reasoning ?












