Good Morning, Keith. you are quoting the rules for a Class B aircraft, which has no V1 and does not consider an engine failure on the runway. I had assumed from the question (which refers to both V1 and a continued take-off after an engine failure) that it must be a Class A aircraft, and on a dry runway, which leads me to (c) 7000ft, like Beags. I'm looking for the catch but can't see it!
The pedant would say that the parameters of the question are not quite correct, that the engine failure should occur at VEF, that there is a minimum one second gap between VEF and V1, and that V1 is the speed at which, in the event of a rejected take-off, the first action should be taken to abort and, in the event of a continued take-off, is the minimum speed to continue to make 35ft and V2 at the screen height.