What was the United States policy known as containment?

At the time if the glorious revolution and the writing if the english bill of rights, americans

Which of these actions were taken by the us government to get ready for war? check all that apply. using a draft to build armed forces planting victory gardens for food and to boost morale promoting conservation of key products trying to get people to buy liberty bonds taking new jobs to meet demands promoting patriotism

Were african-americans allowed to serve in the military in wwi? explain