Staying upright during vigorous physical activity is best described as having good
a. balance
b. flexibility
c. agility
d. reaction time

The correct answer is letter A.

A person who can stand upright during vigorous physical activity has a good balance. Balance is a skill related fitness component that refers to the ability of a person to maintain the body's equilibrium at rest or in motion. 

Ithink the correct answer would be that since the disease is passed by a hand shake and can be cured with antibiotics that it could be an infection. an example could be that once when i was working in a bush camp, i got blood poisoning from blood blisters that got infected. our cook did not wash his hands after going to the bathroom and he passed staphyloccus on to the crew he fed. one other person also got a bad similar infection on the side of his face. i had to be rescued by helicopter and taken to the hospital so i wouldn't die!