Question

If you have to reject a job offer because it isn't what you wanted, what is the best step to take?
a.
Say no at the interview to save the employer time
b.
Do not call the interviewer back
c.
Call the interviewer back, thank them, and give a reason for your answer
d.
Call the interviewer and let them know you would never work for them

Answer 1

c. Call the interviewer back, thank them, and give a reason for your answer

This is professional, courteous, and keeps the relationship positive for future opportunities.