Adults generally breathe in and out 12 to 20 times per minute. People sitting down breathe more slowly than those standing up. The older adults become, the more slowly they breathe. Children breathe twice as fast as adults. Women generally breathe faster than men.
Which of the following persons would most likely breathe the slowest?
A . a 10-year-old girl standing up
B . a 15-year-old boy sitting down
C . a 15-year-old girl sitting down
D . a 50-year-old man sitting down
E . a 50-year-old woman standing up
Answer: D