Agroup of veterinarians at a major veterinary hospital was interested in investigating a possible link between enteroliths, stones that form in the colon of horses, and diet. they decided to conduct a survey of feeding practices of horses in the hospital's state. they created a survey questionnaire and decided to administer it to the owners of every fifth horse being treated at the hospital. the population of interest is: a. all horses brought to the clinic. b. all horses in the state. c. all horses that are diagnosed with enteroliths. d. none of the answer choices is correct.