Answer:
is a blind, neutral experiment
Explanation:
In Science, to have results in which you can trust, always need to be a comparative ( in this case the creatinine supplementation and the other powder). To be a serious experiment, need to have the same activities, duration and the participants need to "blind" to know which substance they are really taking, so they need to train as usual, and after some time the results will show if there is a significant difference.
Your food will taste better.
Your breath and clothes will also start smelling better. :)
Visual constancy applies to size, color, and shape.
Answer is D) all of the above.
"<span>Increase his activity and exercise levels and add more calories to gradually gain weight" is the best choice.
Hope this helps!</span>
to make our hurt spots feel better