Question

blood type is considered class evidence. why?

Explanation:

Class evidence is evidence that can be associated with a group of people, not a single individual. Blood types (e.g., A, B, AB, O) are shared by many people (e.g., a large percentage of the population has type O blood). Since blood type alone can't uniquely identify one person (multiple people have the same blood type), it falls into class evidence as it narrows down to a class (group) of individuals with that blood type, not a specific person.

Answer:

Blood type is class evidence because it is shared by a group of people (multiple individuals have the same blood type, e.g., many people have type O, A, B, or AB blood). It cannot uniquely identify a single person, only a class (group) of people with that blood type, so it is associated with a group rather than an individual.