In august 1963, more than 200,000 joined the in support of civil rights legislation.

 On 1963, month of August, more than two hundred thousand people joined the March on Washington in order to support the civil rights legislation.  Civil rights is the abolishing of the discrimination for the black people living in America and to have an equal rights to the white.

fourteenth amendment

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering