[Back In The Saddle]

The NFHS rule on running the endline is 7-5-7. "After a goal or awarded goal as in 7-4-3, the team not credited with the score shall make the throw-in from the end of the court where the goal was made and from any point outside the end line. A team retains this privilege if the scoring team commits a violation or common foul (before the throw-in ends and before the bonus is in effect) and the ensuing throw-in spot would have been on the end line. Any player of the team may make a direct throw-in or he/she may pass the ball along the end line to a teammate(s) outside the boundary line."

Note that the right to run the endline is retained after a common foul. A double foul is not a common foul. NFHS 4-19-2: "A common foul is a personal foul which is neither flagrant nor intentional nor committed against a player trying or tapping for a field goal nor a part of a double, simultaneous or multiple foul."

So A does not retain the right to run the endline. However, as Z pointed out, you do go the POI (which does not, however, include running the endline).