Vice president d. cheney was called upon to temporarily assume the office of president when
a. president bush was on vacation at camp david
b. he was sent on diplomatic missions in the middle east
c. president bush attended his impeachment hearings in joint sessions of congress
d. president bush, on two occasions, had to undergo surgical procedure

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.

could you show the options for the answers? : )