I’ll try to convince him as _____ I can.
B. best as
C. the best
D. well as
Correct Option: Answer is A
The phrase “as best I can” is a common idiom that means “to the best of my ability”. It is used to express that someone is trying their hardest to do something. In the sentence “I’ll try to convince him as best I can”, the speaker is expressing that they will try their hardest to convince the person.