How did the Khmer civilization shape culture in Southeast Asia?

Select the two correct answers
A. Developed writing that spread throughout Asia
B. Introduced Islam via Indian Ocean trade routes
C. Innovated a feudal system based on the loyalty of samurai warriors
D. Used irrigation canals and reservoirs to support large-scale rice
E. Built vast Buddhist temple complexes

A. Developed writing that spread throughout Asia

D. Used irrigation canals and reservoirs to support large-scale rice production