---------Tony,where are the cookies Donot tell me you ( ) th

---------Tony,where are the cookies Donot tell me you ( ) them all!Again!
---------Tony,where are the cookies Donot tell me you ( ) them all!Again!
---------Yes ,I did .I couldnot help it .They were so good.
A.had eaten B.ate
C,are eating D,have eaten
正解为b 我选d了,为什么不行呢?
已经吃完了，对现在有影响，那不就应该是现在完成时吗？为什么非要用过去时呢？