Why do muslims refer to christians and jews as "people of the book"?

Muslims believe that once before Islam was a religion, their were other religions, but all fell under the category; Tawheed. Tawheed was believing one god, which was in what they believed, Allah (swt). Since all of the following religions have a specific book that used to fall under Tawheed, they are the people of the book. 

The answer should be d.

The president of the united states does not have the authority to “limit” the power of the judicial branch. however, the president can influence the political direction of decisions made by justices on the supreme court through the nomination process when a position becomes available.i would say the best answer is that he can at least interpret the laws