I would agree too that if the question would have been. Who where the founders of this Motor Vehicle Company, as you said no car under the name Grabowsky was ever produced.
Not even before 1904, when they changed the name from Grabowsky Motor Vehicle Company into
Rapid Motor Vehicle Company, where vehicles sold under the name Rapid
As the puzzle question was only make and year, 1908 Rapid is the only correct answer is my understanding anyway