The boy thanked the Principal for granting him a fee-concession.

A

The boy said to the Principal, "I express my thanks that you have granted me a fee-concession."

B

The boy said to the Principal, “I am thankful to you for a fee-concession.”

C

The boy told the Principal, “You are kind enough to grant me a fee-concession.”

D

The boy said to the Principal, “Thank you, madam, for granting me a fee-concession.”