Mark the letter A, B, C, or D on you answer sheet...

Câu hỏi: Mark the letter A, B, C, or D on you answer sheet to indicate the word that differs from the rest in the position of the main stress in each of the following questions.

The A.I. expert wanted to have his assistant _______ the newly made robot.

A. activate

B. activated

C. activating

D. to activate