(A) Cambodia
Cambodia is the current country where the kingdom of Angkor originated.
(B) Vietnam
The Angkor Empire dominated much of the territory of the current country of Vietnam.
(C) Khmer
Khmer is the people that shaped the kingdom of Angkor. The language spoken by them is also called Khmer.
(D) Jayavarman II
Jayavarman II was the King-God founder of the Khmer culture.
(E) Buddhism
King Jayavarman VII converted to Buddhism and his subjects followed him, creating a religious syncretism between Buddhism and Hinduism.
(G) Hinduism
Hinduism is the religion adopted from the beginning by the Kingdom of Angkor.