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An abstract class is which of the following?

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An abstract class is which of the following?
  • AA class that has direct instances, but whose descendants may have direct instances.
  • BA class that has no direct instances, but whose descendants may have direct instances.
  • CA class that has direct instances, but whose descendants may not have direct instances.
  • DA class that has no direct instances, but whose descendants may not have direct instances
Correct answer: B
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A class that has no direct instances, but whose descendants may have direct instances.