The answer should be A, the age difference between participants.
<span>When running it is important to always "Stay Hydrated."
When power walking, an average person must perform a speed of "2 miles" per hour.
Hiking constitutes "walking on different terrains".
Among the given choices above, the "dog paddle", is not considered a swimming stroke. </span>
Experienced athletes work out so much they are in a plateau phase, it is harder for them to increase fitness
<span>This diagnostic procedure is called scintigram</span>
Most of the symptoms of abscesses will reside within 2 days, the full alleviation of the abscess will most likely be healed within 5-6 days with antibiotic treatment
