When Using Continuous Training as a Technique to Improve Cardiorespiratory

When using continuous training as a technique to improve cardiorespiratory endurance, what statement is incorrect?

A) Participation must be at least 20-60 minutes of continuous activity with the heart rate elevated to its working level.
B) Engaging in no fewer than three sessions per week, aiming for four or five sessions per week.
C) Type of activity must be aerobic.
D) The heart must be elevated to a specific target rate and be maintained at that level during the entire workout.
E) Maintaining the Karvonen formula for exercise heart rate, which uses the maximum heart rate and percentage of target intensity.