The answer is: C. The British Parliament responded to the popular outcry and abolished the slave trade. This did not end slavery.
At that time, the majority of British people realized the cruelty that being conducted to the African slaves that traded by their empire. So, the British parliament created a law that banned slave trades In England.
Even if England has became among the first European countries to banned the slave trade, Slavery still run rampant among other countries such as Portugal, Netherlands, and United states that still heavily involved in the slave trades.