Suppose you have the following two-way table summarizing data from two categorical variables: Seeing an ad (yeso) and Making a Purchase (yeso). Purchase No Purchase Saw Ad 36 84 120 Didn't See Ad 24 56 80 60 140 200 Which of the following distributions must sum to 1? A-T he marginal distribution of making a purchase (yeso) B- The joint ("and") distribution of seeing the ad (yeso) and making purchase (yeso) C- All of these choices are correct D- The conditional distribution of making a purchase (yeso) given the person saw the ad