Billy Consumed the Following Foods at Lunch: a Hamburger with Lettuce

Multiple Choice

Billy consumed the following foods at lunch: A hamburger with lettuce, tomato, and catsup on a bun; cabbage salad, potato chips, and a glass of iced tea. Later that afternoon Billy began to experience intestinal gas. Which food was most likely responsible for the gas production?

A) hamburger meat
B) tomato
C) cabbage salad
D) iced tea
E) potato chips