When Interviewing for a Job,the Prospective Employer May Ask What

When interviewing for a job,the prospective employer may ask what salary you expect.You should:

A) Research salary ranges for your profession in the area you live
B) Give them a relatively high figure so that you will make what you want
C) Give them a relatively low figure so that you are sure to get the job
D) Ask them what they are willing to pay