JAVA CERTIFICATION QUESTION: Quiz yourself: Using subclasses and covariant return types

When overloading a Java method, be careful to specify the appropriate return types.

Given the following two classes and the task of creating a subclass of BirdsFarm:

Which of the following methods will be allowed in the new class? Choose one.

A. public List getAllBirds() { /* ... */ }

B. public List getAllBirds() { /* ... */ }

C. public ArrayList getAllBirds() { /* ... */ }

D. public ArrayList getAllBirds() { /* ... */ }

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