A union representative has come to your office and asked you to recognize her union. You say no. The union then files an election petition and the NLRB authorizes the holding of an election. One week before the election, you send out a secret ballot poll asking whether the workers do or do not want the union to represent and you promise no reprisals. Have you committed an unfair labor practice? A) No, because the poll was secret and confidential. B) No, because you guaranteed that there would be no reprisals after receiving the results of the poll. C) Yes, because you can never poll workers about their interest in joining a union. D) Yes, because you sent out the poll after the election was authorized by the Board.