Which of the following best explains how Khorassanians expanded into and ruled India in the 15th century?

A. Local nobility offered little resistance to invaders, as their privileged positions remained largely unchanged.
B. Merchants used connections to develop trade networks, making India dependent on foreign goods.
C. Iranians spread important technologies to less-developed lands, colonizing as they went.
D. In a Shiite theocracy, descendants of Muhammad's original followers are given political power.