Final answer:
The best example to support Melia's claim that year-round schooling does not improve student achievement and engagement is research data showing no significant difference in student growth between traditional and year-round schooling. The correct answer is option C.
Step-by-step explanation:
Melia is writing an argumentative text about year-round schooling and is making the claim that it is not the answer to the decline in student achievement and engagement. The example that best supports her claim is C. a research journal revealing data that both traditional and year-round schooling have the same impact on student growth. This evidence suggests that changing the schooling schedule alone does not significantly alter student outcomes, countering the argument that year-round schooling is a beneficial solution to increasing student engagement and achievement.