Sentence Correction

Each year companies in the United State could save as much as $58 billion annually by preventing illness among employees and gain as much as $200 billion through improving performance of workers if they simply provided offices with cleaner air.

A.　annually by preventing illness among employees and gain as much as $200 billion through improving performance of workers if they simply provided
B.　annually if they prevented employee illness and gain as much as $200 billion through worker performance improved by simply providing
C. annually in employee illness prevention and gain as much as $200 billion through worker performance improved by simply providing
D. in employee illness prevention and gain as much as $200 billion through improving performance of workers if they simply provided
E. by preventing illness among employees and gain as much as $200 billion through improved worker performance if they simply provided

IMO E.

the beginning of the sentence states "each year" .. hence the word "annually" is redundant. Options A, B and C are out.

between D and E, Option E is the best.

what is the OA ?

just_do_it wrote:IMO E.

the beginning of the sentence states "each year" .. hence the word "annually" is redundant. Options A, B and C are out.

between D and E, Option E is the best.

what is the OA ?

OA is E.
I was confused between A and E .Thanks for clearing my doubt