Buddhism Gained Popularity in Southeast Asia in Large Part Because

Buddhism gained popularity in Southeast Asia in large part because

A) prior to the arrival of Buddhism, Southeast Asia did not have any strong religious traditions of its own.
B) Buddhism appealed widely to the rural classes of Southeast Asia, who viewed the religion as a way to prevent their rulers from abusing their authority.
C) Buddhism was attractive to the ruling classes of Southeast Asia, who agreed with the Buddhist model of the moral and just ruler.
D) Buddhism gained popularity throughout Southeast Asia after the Guptas attacked and captured a large swath of territory in the region.