In the context of pharmacology, why is it important to consider the dissociation rate constant (kd) of a drug when designing a new therapeutic agent?

• A. A higher kd indicates that the drug will remain bound to its target longer, potentially increasing its efficacy.
• B. A lower kd indicates that the drug will remain bound to its target longer, potentially increasing its efficacy.
• C. kd only affects the solubility of the drug in water.
• D. kd is not relevant to the drug's binding properties.