The Yerkes-Dodson Law states which of the following?
Tasks that are primarily reinforcing produce the highest level of performance.
Tasks that disrupt an organism's set point motivate the organism to perform behavior designed to return to the set point.
Tasks that are of moderate difficulty tend to produce better performances than tasks of low or high difficulty.
Tasks that involve greater use of blood glucose tend to be performed more poorly than tasks that do not involve the use of much glucose.
Task specificity is more important to performance than type of reinforcement.