Child psychologist: Psychologists have found that most children under the age of six are egocentric and selfish in their attitudes toward animals.
Conclusion (hence)
Most children should not have pets until they are at least six years old.
Evidence
Ordinarily, it is only between the ages of six and nine that children begin to understand that animals are independent creatures with their own feelings and needs.
Prior to six, most kids are egocentric and selfish in their attitudes toward animals.
Evaluate
We're trying to prove a should not claim, but the evidence didn't provide any rules about what we shouldn't do. So we know this New Concept in the Conclusion will be in the correct answer. Specifically, the correct answer will have to give us some rule that's in the form,
All three claims are using general language (most / ordinarily / most).
Conditional statements are generally about things that must always be true. We don't usually consider something a conditional statement when it merely describes something that "ordinarily" happens or something that happens with "most" people in a group.
But if an author is arguing, Most dogs are X. Therefore, Most dogs are Y. We're allowed to think she's assuming, "If X, then Y", because what we know about Most dogs is X and what she's trying to prove about Most dogs is Y.
Here, our author is trying to argue under 6 → should not have pets
Our premises tell us under 6 → selfish/egocentric attitude to animals under 6 → don't understand animals are ind. creatures
Goal
We want to get from What We Know about kids under 6 to What We're Trying to Prove about kids under 6.
So we'd anticipate answers like or .
And of course we'd be happy with either of those in contrapositive form as well.