The main focus of Dr. King’s speech is
A. getting more money for America’s black population
B. convincing everyone to live in peace and tranquility
C. celebrating the anniversary of the Emancipation Proclamation
D. ending segregation and racial injustice in America

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.

answer; (b); the abolitionist movement;

the best asnwer is b "les encantan los juguetes nuevos" because you are talking about them