Both the caliphate and the Mauryan empire in India had successful administrations in their early years. When one compares the administrations, what basic difference exists?

AThe Mauryans had a secular government while the caliphate was a theocracy
BThe caliphate had no standing army while the Mauryans did
CThe Mauryans had one capital city while the caliphate operated from two
DWhile the caliphs were tolerant of other religions, the Mauryans were not.