Final answer:
Carolina's research into zoning laws and immigration history helps her understand the composition of her neighborhood, exemplifying how knowledge of the past informs the present.
Step-by-step explanation:
The example that illustrates how the past helps us make sense of the present or future is D. Carolina researches zoning laws and immigration history, which helps her better understand why her neighborhood is mostly Puerto Rican. By studying the history of zoning laws and immigration patterns, Carolina gains insights into the socio-economic and cultural dynamics that have shaped her community, allowing her to understand its present composition. Understanding such historical context can provide clarity on current issues as well and may guide future developments or changes in her neighborhood.