A．understood
B．took
C．po11ute
D．rude

A．regulations against job discrimination
B．the safety of other performers and the audiences
C．doing the right thing
D．making a lot of money

A．The Earliest People in North America.
B．The Earliest Immigrants to North America.
C．The People of the United States.
D．Europeans Were the Earliest People Coming to the North Americ