Interest rates will change in different economic periods, and the usual situations are ( ).
选项：

A:During the crisis, interest rates will gradually increase;
B:During the depression period, interest rates will tend to fall.;
C:During the recovery phase, interest rates will tend to rise.;
D:During the boom period, interest rates tend to rise.;
E:During the recovery phase, interest rates will tend to fall.;
F:During the crisis, interest rates tend to fall.