How will the right answer fit in terms of support and conclusion?

Only the right answer will add support that guarantees the conclusion.

Highlight the main conclusion in the passage, if there is one:

few children today will develop a lifelong interest in literature

[SUPPORT]. Thus, [CONCLUSION].

There are two common patterns you could recognize to short circuit this one. I’d expect you to see the author changed the subject when they brought in “a lifelong interest” in the conclusion. The right answer will have to explain what that has to do with the support.

Secondarily, the conclusion makes a prediction. You recognize that because it uses the future tense. It’s extremely likely the right answer will connect the present “today” in the support to the “will develop” in the conclusion.

Map the wording of the answers to the wording of the passage:

(A) No children who spend their free time reading stories…

This is tricky. When the author said “few children…”, we’re expected to understand that means only a few, and not more. That’s not the same as just saying ‘a few’. This answer could guarantee that at least a few “will develop a lifelong interest”. I could see keeping this answer in the running, but the right answer really wants to capture the author’s whole meaning. That means guaranteeing that not more than a few will be lifelong readers.

(B) Only those people…will develop a lifelong interest in literature.

Now we can add it all up. If “few children today spend their time reading”, and those are the “only” children who “develop a lifelong interest”, then boom! Only a few children will develop a lifelong interest. The conclusion is 100% guaranteed.

This is also the only answer that connects what’s happening “currently” to what “will” happen in the future.

(C) …children who grow up in a household that lacks a television…

…aren’t mentioned in the passage. The passage is based on “the ubiquity of television”, so kids without TVs aren’t a part of the argument. This is irrelevant.

(D) Few people who watch a great deal of television…

Careful! It’s easy to assume this is what the author meant, but the passage never actually says anyone watches “a great deal” of TV. To make this answer work, you have to add in your own assumption. That’s never allowed.

(E) …watch television

We have no idea if the readers and watchers overlap. It might be reasonable to assume they don’t, but that’s not mentioned or referenced in the passage. Even if this is true, it doesn’t guarantee who “will develop a lifelong interest”.

(B) is the correct answer.

Common pattern/s in this question: Of course the right answer connected wording in the support to wording in the conclusion, which always happens when the author changes the subject. But the right answer was also the only one that filled in the gap between present and future, thus guaranteeing the prediction in the conclusion.