Cooperative federalism is often compared to a marblecake

Cook and Campbell (1979) noted that

A) measures used in the field are often invalid. B) researchers cannot assume that findings from the lab will hold in the field. C) field research is not reliable and should not be used to answer questions of causality. D) All of the above

Which of the following is the biggest group of people to receive benefits under TANF?

A. The elderly B. Children under age 18 C. Single mothers with children D. Expectant mothers E. The disabled