[讨论]885-20-20关于代词指代的问题

        Since savings banks have to use short-term deposits to finance long-term fixed-rate mortgage loans, they sometimes lose money when there is a rise in short-term rates and, on the other hand, they are unable to raise the rates on their mortgages.

(A) when there is a rise in short-term rates and, on the other hand, they are unable to raise

(B) when short-term rates rise and they are unable to raise

(C) when a rise in short-term rates occurs and, correspondingly, there is no rise possible in

(D) with a rise in short-term rates, and they are unable to raise（B）

(E) with short-term rates on the rise and no rise possible in

请问：B中的they不会造成指代不清吗？they也有可能指代short-term rates啊