For the Situation Above, Give a Practical Interpretation Of $r = .81$

For the situation above, give a practical interpretation of $r = .81$ .

A) We can predict SALARY correctly $81 \%$ of the time using GMAT in a straight-line model.
B) We estimate SALARY to increase $81 \%$ for every 1 -point increase in GMAT.
C) $81 \%$ of the sample variation in SALARY can be explained by using GMAT in a straight-line model.
D) There appears to be a positive correlation between SALARY and GMAT.