Always avoid . . . . . . . . mistakes.

A. making

B. to make

C. doing

D. to do

Answer: Option A

Solution(By Examveda Team)

Gerunds can be used after certain verbs including enjoy, fancy, discuss, dislike, finish, mind, suggest, recommend, keep, and avoid. After prepositions of place and time.
Example: I made dinner before getting home.
He looked unhappy after seeing his work schedule.