Need help, please! 
 Suppose you will perform a test to determine whether there is sufficient evidence to support a claim of a linear correlation between two variables. Find the critical values of r given the number of
 pairs of data in and the significance level a
 n=14,a=0.01
 A: r=0.661
 B: r= +- 0.532
 C: r= 0.684
 D: r= +- 0.661