og 255

255. The bank holds $3 billion in loans that are seriously delinquent or in such trouble that they do not expect payments when due.

(A) they do not expect payments when

(B) it does not expect payments when it is

(C) it does not expect payments to be made when they are

(D) payments are not to be expected to be paid when

(E) payments are not expected to be paid when they will be

OG对a答案得解释：they do not expect payments when due makes the modification of due unclear.  不太理解，盼指点。

the answer is C.

I still did not understand well and look for furthe explanation.

thank you all.