## Core Concept
The range of a dataset is a measure of dispersion or variability, calculated as the difference between the highest and lowest values in the dataset.

## Why the Correct Answer is Right
To find the range, we first identify the highest and lowest values in the given dataset: 7, 9, 6, 8, 11, 10, 4. The highest value is 11 and the lowest value is 4. The range is then calculated as the highest value minus the lowest value: 11 - 4 = 7.

## Why Each Wrong Option is Incorrect
- **Option A:** This option is incorrect because it does not match our calculated range of 7.
- **Option B:** This option is incorrect because, similar to Option A, it does not match the calculated range.
- **Option C:** Although this option also equals 7, let's verify if it matches the calculation: it indeed does, but we need to confirm if the other options have obvious errors.
- **Option D:** This option is incorrect as it suggests a range that does not align with our calculation.

## Clinical Pearl / High-Yield Fact
In statistics and data analysis, understanding the range is crucial as it provides a simple measure of variability. However, it is sensitive to outliers. A memorable point is that range is calculated as: Range = Maximum value - Minimum value.

## Correct Answer: C. 7