You extend the SoapExtension class to implement a SOAP extension.
You need to override the ChainStream method to implement the SOAP extension functionality correctly.

What should you do?

A.
Save references to the input and output streams that the SOAP extension will use to send and receive data.

B.
Add the SOAP extension to the position in the SOAP extension chain that assigns the appropriate priority.

C.
Create and return a new stream that will be used to send data down the chain.
Save a reference to the stream that is coming from higher on the chain.

D.
Register event listeners that will modify data for the input and output streams that the SOAP extension will use.