-Refer to Research Study 8

Multiple Choice

-Refer to Research Study 8.2 above to answer the following question. Given Dr.Sparrow's design,which of the following is his study best able to deal with?

A) The ethical issue of manipulating income level
B) The issue of temporal precedence between his two variables
C) The issue of external validity of his findings
D) The issue of whether marital satisfaction changes over time
E) None of the above