A boycott is when a group of people and/or businesses refuse to buy certain products.
An embargo is sort of a boycott of one country by another country.
The United States has a trade embargo against Cuba.
African-American citizens of Montgomery, Alabama refused to use mass transit during the Montgomery Bus Boycott in protest of the system's racial discrimination.
The answer is B. The attempt at improving the status of African Americans failed.
B) Liberal
liberals agree with this because they want to provide programs and funds to benefit the less-fortunate.