In these question, a sentence/a part of the sentence is in bracket. Below are given alternatives to the in Bracket part at (a), (b), (c) which may improve the sentence. Choose the correct alternative. In case no improvement is needed your answer is (d)Question: We (have to know that) we can achieve things slowly and gradually, not overnight.

• A. would know that
• B. had to know that
• C. must know that
• D. No improvement