What is the general tone of the author in this passage

A．Stereotypes give rise to prejudice against other cultural groups.
B．Misunderstanding occurs when members of different cultures communicate.
C．Cultural influences on the style of communication are generally very subtle.
D．Conflicts arising from cultural misunderstanding are serious.

A．Because these changes are threatening the partnership between Europe and America.
B．Because these changes lead Europe to adopt its own economic and political policies.
C．Because these changes are more important than war and protectionism issues.
D．Because theses changes are domesti