Question

The given sentence is in active/ passive voice. Change the voice of the sentence. Select the correct option from the sentence below.He had kept up his diet program for a month. 

a. His diet program had been kept up for a month.

b. His diet program was kept up for a month.

c. His diet program had been kept for a month.

d. The doctor had kept up his diet program for a month.

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Answer 1

Explanation:

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