Answer:
all of the above
Step-by-step explanation:
In the 1880s, there were various European nations that can begin expanding into Africa and eventually gain control over most of the continent. The Europeans were able to infiltrate based on the following reasons:
1. Africans lacked tribal unity
2. Europeans had better technology
3. the development of quinine helped fight African diseases
Hence, in this case, the correct answer from.the available options is "ALL OF THE ABOVE"