Answer:
C) a one-way between-subjects ANOVA
Step-by-step explanation:
Based on the information provided within the question it can be said that the best type of design would be a one-way between-subjects ANOVA. This is a type of design in which the participant population is divided into three or more groups that are independent from one another. Which is the case in this scenario since the researcher divides the participants into three groups with low, moderate, or intense levels of excercise , making them independent from one another.