A registered patent agent represents Client A in a patent application. Client B later approaches the agent with a substantially related matter that is directly adverse to Client A. Under the USPTO Rules of Professional Conduct, what must the agent do?
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A
Decline to represent Client B unless both clients give informed written consent
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B
Proceed with Client B's matter since it is a different application
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C
Withdraw from Client A's matter and freely represent Client B
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D
Seek a waiver only from Client B since Client A is the existing client