You wish to analyze the relationship between two variables of your dataset. For which pair of variables could you create a contingency table? a. body mass index and diabetes (whether the patient is diabetes positive or negative) b. gender and pregnancy (the number of times a patient was pregnant) c. gender and diabetes (whether the patient is diabetes positive or negative) d. body mass index and pregnancy (the number of times a patient was pregnant) e. body mass index and diabetes (whether the patient is diabetes positive or negative)