Which of the phrases given below the sentence should replace the phrase printed in bold type to make it grammatically correct? If the sentence is correct as it is, mark 'E' as the answer.

Making friends is more rewarding than to make enemies.

A.

to be unsociable

B.

to be sociable

C.

being unsociable

D.

making enemies

E.

No correction required

Correct answer is D

No explanation has been provided for this answer.