I think c, a and b just learn and study about what was built before
Greek playwrights explored moral and social issues, and relationships between the people and the gods. They also wrote tragedies to relieve people of pity and fear and comedies which ridiculed modern day issues.
A-Spanish Conquistador, hope it helped
Abu-Bakr spread Islam by defeating the people that went against him and converted them to Islam. If they did not convert he would murder them.
Answer: first appearances of gunpowder artillery
Explanation: