Option A is correct because the notifyAll() method (along with wait() and notify()) must always 

be called from within a synchronized context.

Option B is incorrect because to call wait(), the thread must own the lock on the object that wait() 

is being invoked on, not the other way around.

Option C is wrong because notify() is defined in java.lang.Object.

Option D is wrong because notify() will not cause a thread to release its locks. The thread can only 

release its locks by exiting the synchronized code.