A Research Team Wants to Study the Influence of Childhood

Multiple Choice

A research team wants to study the influence of childhood neighborhood poverty on long-term health,such as life expectancy.As with many sociological questions,there are constraints on how this can be studied.Researchers interested in finding the most developed and reliable answers to such questions should

A) carefully design multiple experiments to establish causality.
B) use multiple strategies to analyze multiple sources of data.
C) target a very large sample for one well-elaborated study.
D) randomly select several neighborhoods,all of which are poor.