What is not a reason lewis and clark were sent on there expedition a) to look for gold and silver b) establish trade relations with the native americans c) strengthen the united states claim to the lands in the northwest d) scientific research

How was the method of making pottery by using coils of clay better than simply shaping the clay by hand? it prevented pottery from cracking when fired. it created a watertight seal. it produced more attractive pottery. the pottery could be cut or stamped with designs.