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Coffee Cram questions 3 and 5 in entity bean intro

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He All,

In HFE chapter 5 (Entity Bean intro):
Question: Which are ways in which a client can get a reference to an existing entity object's local (remote) component interface?
Answer D is: "Receive the reference as a parameter in a method call".
I did not understand why the answer D is true in questions 3 and 5.

Thanks in advance.
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You can get a hold of a component interface via the following ways.
1. Invoking create(), findBy,... from the home interface.
2. Using handle (only for remote interface)
3. Parameterizing a component interface. Just like regular java program.

Bean A{
process(BeanBInterface BeanB){

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