THESE CHILDREN ARE VERY CLEVER. YOU SAW THEM IN MY HOUSE LAST WEEK...

57. These children are very clever. You saw them in my house last week.

A. These children who you saw in my house last week are very clever.

B. These children whom you saw them in my house last week are very clever.

C. These children you saw in my house last week are very clever.

D. All are correct.