E: All of the above.

it says IS the best boy so naturally the answer is D.

if A, then the question who have had to have been who WAS the best boy.

no one cares about your sisters dog or mall dog. those are all good dogs. but best boy is one of yours. I say current.

I firmly believe that the best dog ever title comes down to proximity.

Both, like, literal physical proximity, as well as in a more intangible senses.

It’s A.

The others fall into good boys.