Given that t1 is a reference to a live thread, which is true?（）

AThe Thread.sleep() method can take t1 as an argument.

BThe Object.notify() method can take t1 as an argument.

CThe Thread.yield() method can take t1 as an argument.

DThe Thread.setPriority() method can take t1 as an argument.

EThe Object.notify() method arbitrarily chooses which thread to notify.