Which of the following is considered normal blood pressure?

A. 130-139 or 80-89 mmHg: This range is classified as Stage 1 hypertension according to current American Heart Association (AHA) guidelines. Blood pressure at this level indicates elevated cardiovascular risk and typically warrants lifestyle modification or medication in some adults. B. 140 or higher or 90 or higher mmHg: This is classified as Stage 2 hypertension, reflecting a higher risk for heart disease and stroke. Immediate intervention with lifestyle changes and pharmacologic therapy is usually indicated. C. Less than 120 and less than 80 mmHg: This is considered normal blood pressure. It indicates optimal cardiovascular health with minimal risk of hypertension-related complications. Maintaining this level through lifestyle and monitoring is ideal. D. 120-129 and less than 80 mmHg: This is classified as elevated blood pressure. While not yet hypertension, it signals increased risk and the need for lifestyle modification to prevent progression.