Choose the best answer.
Most of the classmates couldn’t come. He invited them to the birthday party.
A. Most of the classmates he invited to the birthday party couldn’t come.
B. Most of the classmates he was invited to the birthday party couldn’t come.
C. Most of the classmates that he invited them to the birthday party couldn’t come.
D. Most of the classmates which he invited to the birthday party couldn’t come.