Health experts propose that people must ascribe to three beliefs if they hope to change their health behavior. one of these, "susceptibility, " means that people a. recognize they will pay a very high price unless they change their behavior b. believe that changing their behavior will be advantageous to their health c. acknowledge they are at risk for the negative consequences of their behavior d. understand that their attitude will determine whether they change their behavior e. know the reasons why they must change their behavior