Final answer:
Commitment, as described by Sternberg's triangular theory of love, grows over time and may increase faster if the relationship develops positively. It is the long-term maintenance aspect of love. So, the correct answer is option A.
Step-by-step explanation:
According to Sternberg's triangular theory of love, commitment is one of the three components, alongside intimacy and passion. The correct statement about commitment is A. It develops over time, beginning slowly and increasing at a faster rate if the relationship is positive.
Commitment is the decision to stay with another person and the actions taken to maintain that love over time. It's the "in sickness and health" aspect of love that denotes a long-term decision to maintain a relationship. Unlike intimacy, which is about sharing feelings and providing emotional support, and passion, which is linked to physiological arousal and romantic attraction, commitment is about the conscious choice to build and keep a lasting bond.