Three of the Following Constitute What David Easton Called the "Intellectual

Multiple Choice

Three of the following constitute what David Easton called the "intellectual foundation stones" of behavioralism. Which of the four is not a foundation stone?

A) a belief in regularities, uniformities of political behavior
B) a commitment to verification of such generalizations through testing
C) an emphasis on quantification where possible
D) an obligation to use empirical data to advise policymakers