What right did Dr. King and his followers exercise during their marches?

Dr. King and his followers exercised a combination of rights during their marches, which is why the correct choice encompasses all of the options presented.

The right to peaceable assembly is specifically tied to the First Amendment, allowing individuals to gather for collective expression and demonstration. This was central to the civil rights movement, as marches were organized to peacefully protest racial segregation and inequality.

Additionally, the right to free speech was exercised as participants expressed their views and demands for justice, equality, and civil rights through speeches, chants, and signs during these marches. This was a fundamental aspect of their protests, allowing them to communicate their message effectively.

Furthermore, the right to petition the government is also relevant, as many of the marches aimed to highlight grievances and push for legislative change regarding civil rights issues. By bringing attention to these injustices through organized demonstrations, Dr. King and his followers were effectively petitioning the government to take action.

Thus, the combination of these rights was pivotal in the civil rights movement, making the choice that includes all of the options the most accurate representation of Dr. King and his followers' activities during marches.