The executive branch has expanded its powers through what?
a. federal bureaucracies
c. create new laws giving the executive more power
b. changing of the constitution
d. congressional sessions

The right answer your looking for is A 

The one that considered as a direct result of the presidential committee on civil rights’

The american anti-slavery society (aass) (1833–1870) was an abolitionist society founded by william lloyd garrison, and arthur tappan. frederick douglass, an escaped slave, was a key leader of this society who often spoke at its meetings.