谁能告诉我这道题的答案？

The particular design of muscles and bones in the neck and limbs of the turtle allow

that it can draw in its exposed parts such that an attacker can find nothing

but hard shell to bite.

A.     allow that it can draw in its exposed parts such that

B.     allow it to draw in its exposed parts, and so

C.     allows for it to draw in its exposed parts and that

D.     allows that it can draw in its exposed parts, and so

E allows it to draw in its exposed parts,so that

选D or E ？？答案是D.但不太信。

确实只有DE的选择。

design allows that it can draw in its exposed parts, and so an .... >>

design allows it to draw in its exposed parts, so that an...不应该有，号，况且it的指代有问题，虽然逻辑上可以指代the turtle.

选E

E

选E

D中的allow that是承认的意思，放在这里根本不对