Which of the following characteristics best set apart the postclassical era from any time before it?
a. the development of democracy
b. the growth of the islamic empire
c. the implementation of the code of hammurabi
d. the formation of the first monarchies

B is the correct option.

Explanation:

Islam spread through the conquests, these conquests were inspired by religion and politics equally. Although there limited sources that talk about the early conquest but they are unreliable. The spread of Islam went hand in hand with military conquests. Historians are divided that whether Islam was a motivating factor behind Muslim Imperialism. There are several passages in the Quran supporting military actions against Non-Muslims.

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast