In the 1880's, how were various European nations able to begin expanding into Africa and eventually gain control over most of the continent?

the development of quinine helped fight African diseases

Africans lacked tribal unity

all of the above

Europeans had better technology

Government taxes ? i guess

Assemblies do not have written codes of laws. laws are matters for magistrates and courts, not assemblies. codes of law are things such as civil law, criminal law, and constitutional law. what assemblies have are procedures regarding debating, voting and other business they might carry out.  also note that rome had three assemblies: the assembly of the soldiers, the assembly of the tribes, and the plebeian councils.