package geometry； public class Hypotenuse { public InnerTriangle it = new InnerTriangle（）； class InnerTriangle { public int base； public int height； } } Which is true about the class of an object that can reference the variable base？ （）
- A It can be any class.
- B No class has access to base.
- C The class must belong to the geometry package.
- D The class must be a subclass of the class Hypotenuse.