The inference about Mercer that is best supported by the text is: B. Mercer hails from New Orleans.
Inference is known to be a form of conclusion that is the derived after a fact or evidence has been examined. It is also made as a result of one's thorough reasoning over a particular subject matter or issue.
We can see that the best inference that is presented by this text about Mercer is that Mercer hails from New Orleans.
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