It can be inferred from the passage that ______ .A．Charles Williams had tried to prevent h

It can be inferred from the passage that ______ .

A．Charles Williams had tried to prevent his son from the killing

B．Charles Andrew kept his scheme to shoot as a top secret

C．people who had the clue of the killing did not take Andrew’s words seriously except two

D．some of Andrew’s classmates found a revolver in his backpack