Couple parts then if I may. In trying to answer the question from the rules and in table 7-5 -4 the enforcement is the basic spot.
While it does not say so, it is assumed this was a loose ball and as you said, is about where the foul occurred and the type of play and again as you point out -- " Illegal touching would be enforced from the spot of the foul if the touching occurs behind the basic spot (snap) based on ABO or previous spot if the touching occurs at or beyond the previous spot" such a case would this question would have to be "False" since there is only the option of True, False. ??
Yep in this case the author is a retired educator and has officiated at the highests and is the --and I am not trying to argue within him about the question --rather that as you said it is flawed. And accordingly I am adjusting my own premise.