Suppose for the Three Variables, GPA (X₁), Time Spent on Watching

Multiple Choice

Suppose for the three variables, GPA (X₁) , time spent on watching TV (X₂) , and IQ (X₃) , the bivariate correlation coefficients are computed as below:
R₁₂ = -0.4; r₁₃ = 0.6; r₂₃ = 0.
If we remove the influence of IQ from GPA, the correlation of GPA and the time spent on watching TV will be

A) stronger than the bivariate correlation r₁₂.
B) weaker than the bivariate correlation r₁₂.
C) the same as the bivariate correlation r₁₂.
D) uncertain.