Patricia Has Just Been Offered a Full-Time Position Over the Phone

Patricia has just been offered a full-time position over the phone and has decided that the position isn't right for her and that she will turn it down. What should she do she must turn a job down?

A) She should do nothing because the employer will figure out soon enough that she isn't going to accept the position.
B) She should accept the position anyway to ensure that she'll have a back-up plan in case no other offers come in.
C) She should visit the employer in person to explain in detail why she isn't going to accept the position.
D) She should write a letter thanking the employer for the job offer and briefly explaining that she is declining a job offer.