In the following items， which ones are belonging to the waining signs of problem loans（）.

In the following items， which ones are belonging to the waining signs of problem loans（）.
A.adverse changes in the price of stock
B.an sudden changes in accounting methods
C.unusual delays in receiving financial statements
D.restructuring debt or eliminating dividend payments or changes in credit rating
正确答案：adverse changes in the price of stock；an sudden changes in accounting methods；unusual delays in receiving financial statements；restructuring debt or eliminating dividend payments or changes in credit rating