Hint: Systolic pressure (first) reflects how much pressure the blood generates against the artery walls as one's heartbeats. Systolic pressure is more important than diastolic pressure since it is associated with the risk of cardiovascular disease.
Complete answer: The cumulative heart rate reading is obtained by estimating the systolic and diastolic blood pressure. Systolic pressure, the highest number, tests the strength one's heart exerts mostly on walls of the arteries every time it beats. Diastolic pressure, the lower number, measures the strength of one's heart on the walls of the arteries between the beats. When the heartbeats, it tries to squeeze and drives the blood through the arteries to the entire body. This pressure causes pressure on your blood vessels, and this is our systolic blood pressure. The systolic pressure levels must be as follows: normal: around 120 mm Hg and elevated: 120-129 mm Hg, stage 1 high blood pressure (hypertension): 130-139.
So, the correct option is (A).
Note: BP is the pressure that flows against the walls of blood vessels. Most of this pressure is attributable to the blood pumping of the heart into the circulatory system. The phrase "blood pressure" represents the pressure in the larger arteries. Blood pressure is reported in terms of systolic pressure (maximum pressure during a heartbeat) and diastolic pressure (minimum pressure among two heartbeats) during cardiac cycle.