A study shows the response (infection or not) to three different treatments. Which of the following shows the difference in proportions of infections with two different treatments? Treatment Infections No Infection Total Cranberry juice 42 50 92 Lactobacillus 20 30 50 None 18 32 50.

A. Pr(infection) Pr(no infection)
B. Pr(infection cranberry juice) Pr(no infection cranberry juice)
C. Pr(infection cranberry juice) Pr(infection none)