How did the the Khmer civilization shape culture in Southeast Asia? Select the two correct answers. 30 POINTS PLS HELPPPPP QUICK
A.
innovated a feudal system based on the loyalty of samurai warriors
B.
developed writing systems that spread throughout Asia
C.
used irrigation canals and reservoirs to support large-scale rice farming
D.
introduced Islam via Indian Ocean trade routes
E.
built vast Buddhist temple complexes