Final answer:
Eating before a long walk is essential to prevent hunger, avoid hypoglycemia, and provide muscles with the needed fuel for optimal performance. Therefore correct option is D
Step-by-step explanation:
According to Nancy Clark, you should eat before a long walk to prevent hunger pangs, prevent hypoglycemia or low blood sugar, and to provide fuel for your muscles. Eating before engaging in physical activity like a long walk helps maintain stable blood glucose and insulin levels. Consuming carbohydrates before exercise ensures the body has enough glucose, which is the primary source of fuel for muscles, thereby preventing the body from experiencing a drop in blood sugar that can lead to hypoglycemia. This is particularly important because low blood sugar levels can stimulate a neurotransmitter that signals the brain when the stomach is full, which could subsequently reduce hunger and impair performance. Furthermore, consuming food ensures you have enough energy in the form of ATP, which is necessary for muscle contractions during the walk.