Answer: A. Overconfidence bias
Explanation: Since Ford was convinced that the modifications made by police departments were the cause of the problem, and not the manufacturing of the vehicle, they exhibited the overconfidence bias, a propensity to hold false and misleading assessment of our abilities, skills, intellect, talent etc in that it causes one to act without reflection. There is subjective confidence on the part of Ford preventing them from seeing the problem as it were objectively.