Which statement about Sternberg's triangular theory of love is incorrect?
a. Different aspects of love are hierarchical. For example, companionate love is much better and longer lasting than consummate love.
b. Different aspects of love might be more prevalent at different life stages.
c. Healthy relationships will have all three components of love: intimacy, passion, and commitment.
d. Seven types of love can be described from the three components of love.