Consider a Dog class and a Mammal class. Which is true? Group of answer choices The Dog class is abstract The Mammal class is concrete Both classes are concrete The Mammal class is abstract

Mammals include mammals having hair, udders used to suckle infants having milk, a stomach, four bones in the eardrum, and a jaw bone built up of a single set of bones which clarifies with the skull uniquely.

Therefore, the answer is the last choice "Mammal is an abstract class".

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