Since elderly people may have difficulty standing to have their heights measured, researcher obtained the following least-square regression equation to predict overall height (cm) from knee height (cm): y = 2.4x + 44

Which of the following statements is correct?

A. If the knee height of an elderly is 46 cm, the elderly's predicted overall height is 154.4 cm.

B. The correlation between knee height and overall height is positive but we cannot say what the exact correlation value is.

C. Both A and B.

D. Neither A nor B.