Answer:
A) control group is the right answer
<span>The answers you have provided here are correct - zero on a ph scale is very acidic, and 14 on a ph scale is very basic. Acidic and basic are the two furthest ends of the ph scale - so for example a ph of 7 would be neutral, but less than that is acidic and more than that is basic.</span>
The kilometer is the independent, since it stays the same, and the increasing his exercise time is the dependent since that’s what’s changing