**Core Concept**
Mottled enamel, also known as fluorosis, is a condition of the teeth caused by excessive exposure to fluoride during tooth development. This results in discoloration and pitting of the enamel.

**Why the Correct Answer is Right**
The term "mottled enamel" was initially used to describe the discoloration of teeth in children who drank water from wells in Colorado. The condition was later found to be caused by the high concentration of fluoride in the water. The fluoride binds to the calcium and phosphate in the enamel, leading to the characteristic white or brown spots. This condition is a result of the excessive intake of fluoride during tooth development, which affects the formation of the enamel.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because there is no evidence to support the use of this term by the individual mentioned.
* **Option B:** This option is incorrect because the term "Colorado stain" was not given by this individual.
* **Option C:** This option is incorrect because there is no evidence to support the use of this term by the individual mentioned.

**Clinical Pearl / High-Yield Fact**
The term "mottled enamel" was given by Dr. Frederick McKay, who first described the condition in the early 20th century. The condition is a classic example of a preventable dental health issue caused by excessive fluoride intake.

**Correct Answer:** C.