What happened to the economy after the Songhai kingdom fell in Western Africa?
A. It became more prosperous.
B. It experienced a decline.
C. The slave trade no longer impacted it.
D. Those in the 15-40 age range became the primary
workers.

those in the 15-40 age range became the primary workers

pope john paul ii ( his real name is karol wojtyla) and lech walesa ( the leader of the solidarity movement ) were both born in poland.

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering