Which of the following statements is true?

Topical fluoride application in a gel vehicle will induce fluorosis

Fluoride can induce fluorosis by affecting enamel maturation

There is no increased risk of fluorosis when young children swallow fluoridated toothpaste

All white, opaque enamel disturbances can be attributed to excessive fluoride intake

The use of fluoride supplements in a fluoridated area has no effect on fluorosis.