Two researchers are analysing the exact same dataset, using multiple regression analyses to predict marital satisfaction from secure attachment, neuroticism, and commitment values. Paul decides to conduct a standard multiple regression. Jeremy decides to conduct a hierarchical multiple regression with neuroticism and secure attachment in Block 1 and commitment values in Block 2. The coefficients for all three variables arethe same for both researchers. Which of the following statements must be true about the relationships among the independent variables?

1. Commitment values are correlated with secure attachment.
2. Commitment values are not correlated with either secure attachment or neuroticism.
3. Neuroticism is correlated with secure attachment
4. Commitment values are correlated with neuroticism.