Help me with history test pls

Briefly discuss radical republicans' characteristics and their roles in advancing rights for black americans.

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.

Which country was the last to join the allied powers? o great britain o france o united states o china