Martin luther king jr. delivered his “i have a dream” speech a. after four african american girls were killed by a bomb in birmingham. b. during the march on washington. c. while he was imprisoned in the birmingham jail. d. to encourage johnson to sign the voting rights act of 1965.

southerners, for their part, considered brown a terrorist. they felt threatened by northerners' deification of brown and worried about the potential for other, similar armed insurrections.

explanation:

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering