Which of the following statements about type compatibility is true?
Which of the following statements about type compatibility is true?
options:
| An object of a subclass can be assigned to a reference to its superclass without a type cast |
| An object of a subclass can be assigned to a reference to its superclass, but type casting is required |
| Assigning an object of a superclass to a reference to one of its subclasses always causes a compilation error whether type casting is used or not |
| An object of a superclass can be assigned to a reference to one of its subclasses without casting |
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