What does the passage mainly tell us?A.Invention of chewing gum.B.Chewing gum's contributi
What does the passage mainly tell us?
A.Invention of chewing gum.
B.Chewing gum's contribution to people's health.
C.How Wrigley made chewing gum popular in the U.S.
D.Chewing gum -- a great favorite with the American people.