The louisiana purchase
nearly tripled the size of the united states.
improved relations between the united states and britain.
set the border between the united states and canada at the forty-ninth parallel.
nearly doubled the size of the united states.

what are local authorities doing to fix the problem

explanation:

the answer is false.

ok sorry the answer is a. by their religion

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering