A Rank Correlation Coefficient Is to Be Calculated for a Collection

Multiple Choice

A rank correlation coefficient is to be calculated for a collection of paired data. The values lie between -10 and 10. Which of the following could affect the value of the rank correlation coefficient?
I: Multiplying every value of one variable by 3
II: Interchanging the two variables
III: Adding 2 to each value of one variable
IV: Replacing every value of one variable by its absolute value

A) I
B) III
C) I and IV
D) IV