A three-term-contingency involves a relationship between __________ , __________ , and __________

According to a recent Federal Reserve Bank analysis of the economics of the Perry Preschool Project,

a. public funding of early interventions is not a good investment b. the return on the public investment in early interventions cannot be calculated c. the return on public investment in early interventions is only slightly better than other public expenditures, such as roads and sports stadiums d. public funding of early interventions saves money in the long run by reducing the need for special education services and welfare support

Professor Gimbly wants to investigate how children of different ages characterize their friendships. Professor Gimbly should use a __________ research design

A) cross-sectional B) sequential C) correlational D) longitudinal