Interestingly, Color Additives to Foods Are NOT Covered by the United

Interestingly, color additives to foods are NOT covered by the United States Federal Food, Drug, and Cosmetic Act. Why is a reason for this?

A) Color additives are considered to be non-toxic.
B) Color additives are regulated under other laws.
C) Only digestible additives are covered under the Act.
D) Color additives were 'grandfathered' in as most were in use before 1958.
E) Both c and d