Which statement best describes where pathogens are found? a. pathogens are agents that are used to treat contagious diseases. b. pathogens are disease-causing agents that can be found in the environment and are passed from one individual to another. c. pathogens are used to treat diseases that are passed from one individual to another. d. when disease-causing agents are passed from one individual to another, they are not considered pathogens. select the best answer from the choices provided. a b c d