Which of the Four Nonparametric Tests in Your Chapter Should

Which of the four nonparametric tests in your chapter should be used to analyze the data from the following studies?
a. Warren Peace gathered data from the parking lots of 12 medium-sized churches. Six were Methodist and six were Baptist. At each lot he calculated the proportion of cars that had expired license plates.
b. The military, eager to reduce the anxiety levels of parachutists, developed two new methods of training. To compare the methods, the anxiety scores of the two groups were compared. To control for experience, the two group means for number of jumps was eight, which was achieved by matching trainees on the number of jumps.
c. The Minnesota Twins Study (not to be confused with the Minnesota Twins baseball team) is devoted to gathering data on identical twins reared apart. What test would determine the degree of similarity in political attitudes that these people have?
d. E. W. Jacobs (1985) studied the effect on family functioning of a six-month absence of the father. (He used Navy families.) Measures of family functioning were taken in January and then again in July.