When tasks involve mechanical skills, , but when a task involves even rudimentary cognitive skills, . a. the higher the bonus pay, the better the performance becomes; the higher the bonus pay, the poorer the performance becomes b. the higher the bonus pay, the poorer the performance becomes; the higher the bonus pay, the better the performance becomes c. the lower the bonus pay, the better the performance becomes; the higher the bonus pay, the better the performance becomes d. the lower the bonus pay, the poorer the performance becomes; the lower the bonus pay, the poorer the performance becomes