Brianna: It would have been better to buy a tree last summer rather than this summer. The one we bought this summer is struggling to survive this summer's drought. If we had bought one last summer, it would have been able to survive this summer's drought, because last summer's roots. Trees with established roots can better withstand droughts.
What this question is testing
Your task
Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.
Common trap
Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.
Winning move
Predict what a right answer must do, then test each choice against the conclusion-evidence gap.
Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.