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What Is Known for Certain About Visualizer When a Method

Question 26

Multiple Choice

What is known for certain about Visualizer when a method constrains its type parameter as follows?
<E extends Visualizer>


A) Visualizer can refer to either an interface or a class
B) Visualizer must refer to a class
C) Visualizer must refer to an interface
D) Visualizer is another generic type

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