Which of the following statements are true?
a. A subclass is a subset of a superclass.
b. A subclass is usually extended to contain more functions and more detailed information than its superclass.
c. "class A extends B" means A is a subclass of B.
d. "class A extends B" means B is a subclass of A.
b. A subclass is usually extended to contain more functions and more detailed information than its superclass.
c. "class A extends B" means A is a subclass of B.
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