Mr. Gupta said to his son, “Do not take up any responsibility unless you are confident you can do it.”

A. Mr. Gupta advised his son not to take up any responsibility unless he is confident of doing it.
B. Mr. Gupta advised his son against taking up responsibility without completing it.
C. Mr. Gupta advised his son to take up the responsibility of completing the task.
D. Mr. Gupta advised his son not to take up any responsibility unless he was confident that he could do it.