What was the cause of the opium war (1839-1842)?

the chinese government wanted to keep sole control of the opium trade.
the british wanted to stop the east india company from dealing opium.
british merchants wanted to continue the opium trade with china.
opium traders launched a series of raids and attacks against britain.

Which statement describes a primary role of political parties in citizens engage with the u.s. government? o a.) funding citizens' trips to washington, d.c.. o b.) motivating citizens to take action on political issues. o c.) encouraging citizens to work with members of other parties to create change. o d.) polling citizens to assess their opinions. answer is b.) motivating citizens to take action on political issues.