In general, you would expect the platform of a political party to?
a.) guide the political issues of the party's candidate.
b.) determine the outcome of a general election.
c.) lead to a national convention.
d.) consist of party leaders called planks.

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.

you can use this site to summarize your ideas, exotic animals do not make good pets.