Comparing tissue percentage ranges across age groups

Steps:

• Identify minimum and maximum percentages for each tissue type within young and old adult groups.
• Compute range for each tissue as maximum minus minimum value across both groups combined.
• Compare the three ranges: collagen, muscle, and elastic tissue.
• Select the tissue with the largest combined range.

Why C is correct:

• Range is defined as the difference between maximum and minimum values; elastic tissue shows the widest spread (e.g., 0-60%) across both groups, exceeding collagen (20-40%) and muscle (30-50%).

Why the others are wrong:

• A: Collagen range is 20, not 39.
• B: Muscle range in old adults (15) is about 1.5 times young (10), not four times.
• D: Elastic range in old adults (25) is roughly twice young (12), not four times.

Final answer: C