Prediction: if cows need to eat protein to build muscle tissue, then an increase in the amount of protein in a cow's diet will result in an increase in the average weight of a cow over a two-year period.
which of the following best describes this prediction?
a.) not useful, because scientists are skeptical of anyone who claims to see into the future
b.) not useful, because it is too long as a sentence and difficult to read
c.) useful, because it specifies what observations will be made to test a hypothesis
d.) useful, because it proves that the hypothesis is true before any data have been collected