What happened before the second great awakening

The Second Great Awakening was a Protestant revival movement during the early nineteenth century. The movement started around 1800, had begun to gain momentum by 1820, and was in decline by 1870. Revivals were a key part of the movement and attracted hundreds of converts to new Protestant denominations.

Explanation:

the answer is states.

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering