Liberia was established in 1847 by freed slaves from the United States.

Although some freed American slaves did settle there, Liberia was actually founded by the American Colonization Society, a group of white Americans—including some slaveholders—that had what certainly can be described as mixed motives.

a, both were musicians during the jazz age

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering