[D-Man]

It's my biggest problem, y'know...

Using the clues from the play:

a.) runner advancing on a hit from second (these usually involve R2 scoring),

b.) an obstruction,

c.) a trip over the base (arguably caused by the obstruction), and

d.) a coach pushing the runner toward home;

lead me to believe that the runner would have scored without the obstruction. The attempted interference in this case would be ignored because of the above reasoning. There is nothing in the rules that says a coach's physical interference supercedes obstruction. I would have to go with (B) not necesarily because it (OBS)happened first but because the INT had no bearing on the play.

Of course, umpire judgment prevails and if the umpire did not feel that the runner would have scored without the obstruction, then I would go with JPC's answer.

D'MAN