Evaluate the significance of the MAP kinase cascade in insulin signaling and its impact on cell growth.

• A. The MAP kinase cascade terminates the signal, preventing cell growth.
• B. The MAP kinase cascade has no impact on transcription factors or cell growth.
• C. The MAP kinase cascade inhibits transcription factors, reducing cell growth.
• D. The MAP kinase cascade amplifies the signal, leading to the activation of transcription factors that promote cell growth.

Answer: (D)