Which book is a primary source for analyzing immigrant life in urban America in the
1890s?

studies show tha in 7.5 billion years from now, the expanding sun will engulf, and destroy, the earth.

silk

indigo  

rice

all the other answers are wrong

the correct answer is b

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering