What role does beta adrenergic receptor kinase (beta arc) play in signal transduction adaptation?

• A. It dephosphorylates the epinephrine receptor, leading to its activation.
• B. It degrades the epinephrine receptor, terminating the signal.
• C. It phosphorylates the epinephrine receptor, leading to its inactivation.
• D. It binds directly to epinephrine, enhancing receptor activity.

Answer: (C)