Read the following group discussion: casey: having a mandatory leash law is ridiculous. people should be able to decide for themselves whether their dog should be on a leash. alex: yeah, but other people are affected by dogs running loose. it's not just up to the owner because it puts other people at risk. casey: yeah, but little kids run loose and are unpredictable, and you wouldn't say that they should have to be tied to their parents. alex: i don't think loose children cause the same degree of damage as loose dogs. which statement would be the strongest cause of bias in the discussion? a. casey is allergic to dogs. b. alex was once bitten by a loose dog. c. alex is the parent of two children. d. casey grew up in a busy city.