Penny is seen organizing racks at a local clothing store one day while she shops, and the manager offers her a job. The next day, Penny's boss from the clothing store across the street comes in and accuses the manager of trying to interfere with Penny's non-competition agreement. Which of the following is true?
A. The manager is guilty of interference with a business relationship.
B. The manager has done nothing wrong because non-competition agreements are never used in clothing retail.
C. The manager has done nothing wrong because he did not know about the non-competition agreement.
D. The manager has interfered with a contractual relationship and will be liable for interfering with a contractual relationship.