—Oh, dear! I can’t find my new bracelet. Where on earth did I put it?

—What a careless guy. It is on the table______ we had dinner together yesterday.

A．which

B．that

C．where

D．what

下面各项中的用于对对象加锁，从而使得对对象的访问是排他的关键字为( )。

A．serialize

B．transient

C．synchronized

D．static