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Which is correct?
a. The Richmond, Virginia, company was founded in July, 2000.
b. The Richmond, Virginia company was founded in July, 2000.
c. The Richmond, Virginia, company was founded in July 2000.
C. The Richmond, Virginia, company was founded in July 2000. Note the comma after the state name. Always put that extra comma if your sentence continues. No comma between year and month.