How long does it usually take for a rock to undergo a stage within the rock cycle a.) thousands to millions of years b.) from 300 to 400 years c.) a few days d.) about 1000 years plz hurry

All of the following came out of china and were exchanged along the silk road, except a. papermaking b. block printing c. buddhism d. compasses select the best answer from the choices provided a b c d