What is the structure of the ends of the adenovirus genome when it is released from the virion into the nucleus?

A) There are no ends - the viral genome is a closed circle.
B) There is a single 5' phosphate.
C) There is a triphosphate at the 5' end.
D) The terminal protein is covalently bound to the 5' end.
E) The ends are paired to each other in a panhandle formation.