What time did the space shuttle challenger explode.

Which of the following scenarios illustrates the cultural impact of expanded regional trade for postclassical civilizations? o a. the byzantine empire rises in place of the roman empire. o b. an islamic scholar attends a university in his hometown. o c. internal disputes weaken a large african empire. o d. an arabian sultan wears a robe made from chinese silk.

Don’t mind the already marked answer but taking it now

What is the scientific revolution? what techniques did the scientist use