Which three are true?

Given the code fragment: Which three are true?

A.
On line 3, the current thread stops and waits until the t1 thread finishes.

B.
This code may throw a checked exception.

C.
This code cannot throw a checked exception.

D.
On line 4, the t1 thread is waiting to run.

E.
On line 3, the t1 thread stops and waits until the current thread finishes.

F.
On line 4, the t1 thread is dead.