When the sentence "The teacher laid special emphasis on the choice of words." is turned in

When the sentence "The teacher laid special emphasis on the choice of words." is turned into passive voice, which of the following is CORRECT？

A．Special emphasis was laid to the choice of words.

B．Special emphasis was laid by the teacher.

C．The choice of words was laid special emphasis on.

D．The choice of words was laid special emphasis.

请帮忙给出正确答案和分析，谢谢！