Answer: D. Body Mass Index
Explanation:
"If your symptoms are above the neck, including a sore throat, nasal congestion, sneezing, and tearing eyes, then it's OK to exercise<span>," he says. "If your symptoms are below the neck, such as coughing, body aches, fever, and fatigue, then it's time to hang up the running shoes until these symptoms subside."</span>
No! External is outside so that would be false. Inside would be internal!
