In Simple Linear Regression, the Coefficient of Correlation R and the Least

In simple linear regression, the coefficient of correlation r and the least squares estimate $$b _ { 1 }$$ of the population slope $$\beta _ { 1 }$$ :

A) Must be the same size and sign.
B) May have both have a different size and different sign.
C) May be the same size but have different sign.
D) May be different sizes but will have the same sign.