Roman builders used rows of arches in there buildings to form a curved ceiling called what

What would a student most likely use if he or she wanted to consult a secondary source

Of the following choices, which ones are characteristics of west african society? select all that apply. a. arabic was the main language used when trading with other societies. b. christianity was the only religion practiced in villages. c. slaves had no rights and were only given specific farming tasks. d. skilled workers were a higher level in the caste system than traders. e. religious rituals encouraged the honoring of ancestors.

How would having more railroad tracks be advantageous during a war