A) Kids could be payed less
Answer:
A. African slavery
Explanation:
Although we know that slavery was an important part of British Empire it was not a part of their system after 1830s. To be precise in 1833, British Empire prohibited slave trade inside their domain. This was in important change, that rearranged the position of the whole Empire.
d. A member may demand a vote
This depends greatly on which side of the debate you're on, but in general labor should take the step of improving union relations with employers and the government.