Questions Refer to the Passage Below

Questions refer to the passage below.
The Country of Chao-wa (Java)
"The country contains three classes of persons. One class consists of the Muslim people; they are all people from every foreign kingdom in the West who have migrated to this country as merchants; [and] in all matters of dressing and feeding everyone is clean and proper.
"One class consists of T'ang people; they are all men from [the southeastern coast of China] . . . who fled away and now live in this country; the food of these people, too, is choice and clean; [and] many of them follow the Muslim religion, doing penance and fasting.
"One class consists of the people of the land; they have very ugly and strange faces, tousled heads, and bare feet; they are devoted to devil worship, this country being among the 'devil-countries' spoken of in Buddhist books; the food which these people eat is very dirty and bad things like snakes, ants, and all kinds of insects and worms, which are slightly cooked by being toasted in the fire and then eaten."
The Overall Survey of the Western Shores, 1433 Ma Huan, Chinese voyager and
translator on Zheng He's voyages
-What might best explain the author's attitude toward the three classes described?

A) He was familiar with the customs of the first two classes he describes and viewed them more favorably.
B) He believed that China was the "Middle Kingdom" between heaven and earth and therefore superior to all other places.
C) Chinese science had clearly established dietary principles that educated people followed.
D) He was suspicious of the Chinese who had "fled" southeastern China.