C, exercise is the correct answer
It is a white solid, but impure samples can appear yellowish. It dissolves well in water to give mildly acidic solutions. Ascorbic acid is one form<span> of </span><span>vitamin C.</span>
Answer:Complete counterbalancing design.
Explanation
In a normal research design the treatment of experimental conditions of a subject will determine the outcome of the research and because many conditions are not tried out, a negative response is usually encountered due to external factors that may not be considered. To counteract this, a counterbalanced design, is adopted which measures all possible treatments and experimental conditions of a subject. this is done by the researcher arranging the subjects to every possible sequences and tasting for all conditions. This is a very good method to avoding errors since all subjects are exposed to all possible treatments.
Here, In a study of the effects of taste (salty; sweet; bitter) on eating, all possible orders of the experimental conditions are arranged in every possible sequence, and an equal number of participants are assigned to each sequence of tastes. This represents a Complete Counterbalancing design
