Select the correct indirect form of the given sentence.
The boss said to his employee, "I will be happy if you finish this project by evening."

A

The boss told his employee that he would be happy if he will finish this project by evening.

B

The boss told his employee that he would be happy if he finishes that project by evening.

C

The boss told his employee that he would be happy if he finished that project by evening.

D

The boss told his employee he will be happy if he finished this project by evening.