What did the montgomery bus boycott teach civil rights activists in montgomery and elsewhere?
one person could make a difference.
segregation laws could be changed.
nonviolent resistance could inspire a violent response.
nonviolent resistance could succeed in ending segregation.

Nonviolent resistance could succeed in ending segregation  is the right answer

Explanation:

A 13 month mass protest of bus boycott in the year 1955 with the arrest of Rosa Park in USA is known as the Montgomery Bus Boycott. In the leadership of Martin Luther, the boycott is an example of successful abolishing of segregation through nonviolent protest. This protest led the Supreme Court’s decision on un-constitutionalism of public buses.

It gained support outside the Montgomery. With the end of the boycott the segregated sitting in buses were removed by the laws of the Supreme Court.  

the virginia plan called for three branches of government and two houses of congress. representation in each house would be determined by population. the new jersey plan called for three branches of government and a single house of congress. each state would have an equal vote.