Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to each of the following questions.
“We saw a strange man in the garden," they told their son.
A. They told their son that we had seen a strange man in the garden.
B. They told their son that they had seen a strange man in the garden.
C. They told their son that we saw a strange man in the garden.
D. They told their son that they saw a strange man in the garden.