【单选题】阅读理解Passage 1 Manners evolved differently in different cultures. In earlier times there was a tendency for manners to become increasingly formal, and this was often viewed as progress. In the 18th a...
A.
Changes of manners over time.
B.
Formal manners in the earlier times.
C.
Different manners in different cultures.
D.
Development of manners in different classes.