Select the most appropriate option to substitute the underlined segment in the given sentence. If no substitution is required, select No improvement. He will pass the driving test if he tries hard enough. (a) if he had tried hard (b) if he trying hard (c) if he tried hard (d) No improvement

Options

A. if he had tried hard
B. if he trying hard
C. if he tried hard
D. No improvement

Answer

D

Explanation

No substitution is required.