Billy consumed the following foods at lunch: A hamburger with lettuce, tomato, and catsup on a bun; broccoli 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.

Iced tea

b.

​Hamburger meat

c.

​Potato chips

d.

Tomato

e.

​Broccoli salad