What is the normal heart rate range for adolescents?

The normal heart rate range for adolescents typically falls between 60 to 100 beats per minute (bpm), aligning most closely with physiological responses observed in that age group. Option A suggests a range of 55-105 bpm, which encompasses the typical upper and lower limits for adolescents while also allowing for some variability that might be observed in athletic populations or during periods of rest. The slight adjustment below 60 bpm could account for well-conditioned young athletes whose resting heart rates may be lower. This range is appropriate considering individual variations, maturity, and activity level.

In contrast, other options provide ranges that are either too narrow or don't effectively capture the full spectrum of heart rate variability expected in adolescents.