The correct answer is A. Your references.
Step-by-step explanation
When you are in a selection process for a job you go through different stages, one of them is an interview where they know you and evaluate your skills, education, experience, etc. based on your Curriculum Vitae or resume. Additionally, in your CV or resume you should include personal and work references of people who can tell the employer about your qualities or experience. In this process, you need to alert your references because it is common after the interview the employer contacts your references to obtain more information and make a decision, in this way if your references know you are in this process they can support or help you. So, the correct answer is A. Your references.