The answer to the question is (B) peripheral nervous system. The peripheral nervous system is responsible for managing signals from the brain to other organs of the body and regulating organ functions such as heart rate and the digestive system. The system includes the nerves and ganglia outside of brain and spinal cord.
The peripheral nervous system is the one that tells you that the coffee cup is warm and if you choose to put down the cup immediately because of it then you just engaged in a reflex response. The brain requires a longer amount of time to decide what action needs to be taken, and in cases where very fast responses (around less than 20 seconds) are required, the peripheral nervous system will take over the decision-making process, especially in regards to fight or flight response.