What means to be released , liberated , or free from enslavement

What would lead a historian to consider two events to have a relationship of correlation rather than causation

When did the us congress declare war on the confederate states?

How was the storming of the bastille important to the french revolutiona) it forced the king to accept the people's demands for justice. b) it marked the official beginning of the french revolution. c) it compelled the government to treat people with respect.d) it exposed the french soldier's lazy attitudes and weak skills.e) it symbolized the constitutional monarchy.