Why was the end of the 19th century know as the "Age of Imperialism"? A African countries aggressively expanded their empires in United States
B European countries aggressively expanded their empires in Asia and Europe
C African countries aggressively expanded their empires in Asia and Africa
D European countries aggressively expanded their empires in Asia and Africa

It came into use after 1850. It was a new kind of European expansion which was not marked by widespread settlement. Its objective was to control territories for political and economic reasons and for national prestige. The late 19th century is often called the Age of Imperialism

either b) they were often feared and despised by other native cultures. or

c) their obsession allowed them to coexist with many other native cultures because of their peaceful nature.

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering