In the question given below, a part of the sentence is in bold and italicised. Below are given alternatives to the bold and italicised part which may improve the sentence. Choose the correct alternative. In case no improvement is needed, choose option 'D' as the answer.

Hoping not to be disturbed, I sat down in my easy chair to read the book I won as a prize.

A.

I had won as a prize

B.

I have won as prize

C.

I had to win as a prize

D.

No improvement

Correct answer is A

No explanation has been provided for this answer.