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

Multiple Choice

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? 

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