Which characteristic of Hinduism did Siddhartha Gautama find most
unacceptable?

Buddhism and Hinduism agree on karma, dharma, moksha and reincarnation. They are different in that Buddhism rejects the priests of Hinduism, the formal rituals, and the caste system. Buddha urged people to seek enlightenment through meditation.

i am pretty sure it is d.

for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.