The sentence related to the idea that organic trash, like food waste, accounts for a lot of the weight and bulk of trash is:
A. “A container of milk here, a bag of cookies there, and a box of raisins—it all adds up to pounds upon pounds of food being thrown away in schools each week.” (paragraph 6)
This sentence emphasizes the amount of food waste generated in schools, which aligns with the concept of organic trash contributing significantly to the bulk of waste.