Answer: Measures the strength of the linear relationship between two random variables.

The correlation coefficient (C) is correct because it quantifies the strength and direction of the linear relationship between two random variables. Option A is incorrect as the correlation coefficient ranges from -1 to +1, not 0 to 1. Option B is incorrect because the presence of outliers can significantly affect the reliability of the correlation coefficient, making it sensitive to extreme values.

Author: LeetQuiz Editorial Team