**Core Concept**
The Rule of 9 is a method used in emergency medicine to estimate the total body surface area (TBSA) affected by a burn injury. This technique is essential for calculating the severity of burns and determining the extent of fluid resuscitation required.

**Why the Correct Answer is Right**
The Rule of 9 is based on the idea that the adult human body can be divided into nine areas, each representing 9% of the total body surface area. These areas include the head and neck, each arm, the front and back of the torso, and the groin area. By estimating the percentage of each area affected by the burn, healthcare providers can calculate the total TBSA involved. This is crucial for predicting the severity of the burn injury and guiding treatment decisions.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the Rule of 9 was not introduced by Charles T. Lanman.
**Option B:** This option is incorrect because the Rule of 9 was not introduced by Richard Cleaveland.
**Option C:** This option is incorrect because the Rule of 9 was not introduced by Sir Archibald McIndoe.

**Clinical Pearl / High-Yield Fact**
The Rule of 9 is a simple yet effective tool for estimating TBSA in burn patients. However, it may not be accurate in children or individuals with unusual body proportions.

**Correct Answer: C. Sir Archibald McIndoe.**