Which of the following events took place at the march on washington?

Match the vocabulary word with its meaning. 1. capitalism to change or improve something by correcting faults or removing abuses 2. chattel an economic system based on private ownership and competition motivated by profit 3. imperialism policy extending political, economic, or military rule over another 4. indentured an economic system where colonies supply goods to the mother country 5. mercantilism an agreement committing one person to be another's slave for a certain period of time 6. reform a type of slavery where the slave is the sole property of the master with no rights

4. any area in which one nation has power over another; i. e. - this happened to china when it was defeated by japan

Which would make the best heading for this list of notes about the migration of african-americans during the reconstruction era?