A.
It is possible to synchronize static methods.
B.
When a thread has yielded as a result of yield(), it releases its locks.
C.
When a thread is sleeping as a result of sleep(), it releases its locks.
D.
The Object.wait() method can be invoked only from a synchronized context.
E.
The Thread.sleep() method can be invoked only from a synchronized context.
F.
When the thread scheduler receives a notify() request, and notifies a thread, that thread immediately releases its lock.