The percentage of cocaine brought through the coast has increased by ______.

A．Nancy should call the neighbors to complain.
B．Nancy should introduce her children to the neighbors.
C．Nancy should ask the neighbors’son to babyish.
D．Nancy should bring the neighbors a gift.

A．To set up a joint research center.
B．To extend their cooperation.
C．To hire some researchers.
D．To complete the project.