struggle certain action police1/50Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questionsstrugglecertain action policeGiải thíchĐáp án D struggleˈstrʌgl certainˈsɜːtn actionˈækʃ(ə)n policepəˈliːs