Which measure of variability, Range or IQR best describes the spread of the dataset?

Question

Social studies group project grades (out of 100 points) for Mr. Chang's first period class are:
85,88,90,90,92,92,95,96,99
IQR; the distribution is symmetrical, or close to it, and there are no outliers in the dataset.
IQR; the distribution is skewed, and there are outliers in the dataset.
Range; the distribution is symmetrical, or close to it, and there are no outliers in the dataset.
Range; the distribution is skewed, and there are outliers in the dataset.

Answer 1

IQR; the distribution is symmetrical, or close to it, and there are no outliers in the dataset.