John and Linda have a disagreement over what is and is not required in order to form an LLC. Linda says that, generally, articles of organization are filed with the State's office of the secretary of state. John says that this is true only if an operating agreement has not been filed prior to the LLC's formation. In this matter,

a. both Linda and John are correct

b. both Linda and John are incorrect

c. Linda is correct and John is in error

d. John is correct and Linda is in error