GWD 10-16，请大家指点

While digging in the Egyptian desert, huge fossil bones have been found by paleontologists, which appears to have been the second most massive dinosaur that ever lived.

A.      huge fossil bones have been found by paleontologists, which appears to have been

B.       huge fossil bones have been found by paleontologists, which appear to be from

C.      it appears that paleontologists have found huge fossil bones that are from

D.      paleontologists have found huge fossil bones from what appears to be

E.       paleontologists have found huge fossil bones, which are from what appear to be

我选的是E，手上这份答案给的是D。

但D我排除的根据是：1、appears用单数，和bones不符。2、found bones from...容易产生歧义，即p学家从...处找到了bones。

如果答案确实是D没错，那么就请NN们帮忙解惑，谢谢