What is the normal fasting glucose range (in mg/dL) described in the material?

• A. 60 to 100 mg/dL
• B. 100 to 140 mg/dL
• C. 120 to 160 mg/dL
• D. 80 to 120 mg/dL

Answer: (D)

The concept being tested is what counts as a normal fasting blood glucose level—glucose measured after a period of not eating. In the material, normal fasting glucose is described as 80 to 120 mg/dL. This range reflects typical baseline glucose when the body has had time to equilibrate after an overnight fast, balancing liver glucose production with insulin response. Values below 80 could signal too little glucose or risk of hypoglycemia, while values above 120 start entering ranges associated with impaired fasting glucose or diabetes in the material’s definitions, so they’re not considered normal. The other ranges fall outside this described normal window, which is why they aren’t the correct answer in this context.