Final answer:
The allowable body percentage for the 21-27 age group is 24% for males and 34% for females.
Step-by-step explanation:
The correct answer to the question is option C) Males: 24%; Females: 34%.
The allowable body percentage for the 21-27 age group is 24% for males and 34% for females.
It's important to note that these percentages may vary depending on factors such as individual body composition and fitness levels.