Advertising tends to have a greater influence on consumer preferences regarding brands of yogurt than it does on consumer preferences regarding brands of milk.
Background
Advertising tends to have more influence on customers when it comes to brands of yogurt than brands of milk.
Surprising Claim
LargeCo supermarket chain started advertising its store-brand of products, and sales of its milk increased more than sales of its yogurt.
Evaluate / Goal
GIVEN THAT advertisements are supposed to have more effect on yougurt-buying than on milk-buying,
WHY IS IT THAT since these ads started, sales of LargeCo milk has gone up more than sales of LargeCo yogurt?