I believe the answer is
B. This pamphlet calmly disputed the claims that had been made in favor of slavery and provided ordinary citizens and abolitionists with arguments explaining why slavery was wrong.
An engaging thematic explanation of the poem
It is a "inferential statistic." Inferential statistics seek to determine what a population might think or believe.
Understanding more about both the company you hope to work for and its competitors will help you appear competent and well prepared for the interview. It will also assist you in preparing good questions to ask of the interviewer if you are given the chance to do so.