From Economics Reading 24's online class,

11.    If money supply and demand are in equilibrium and the central bank sells securities in the open market 

A bank reserves will increase  

B short term interest rate will increase

C firms and households will sell securities for cash.

Why the answer is C? I think it should be B.

Thanks

这个题目我同意你的答案，B更有道理，C看不出什么道理。