What is the main benefit of having a reference for a job application?

Having a reference for a job application primarily serves to verify an applicant's skills. Employers rely on references to obtain an objective assessment of a candidate's abilities, work ethic, and performance from someone who has directly interacted with the applicant in a professional context. This verification helps employers confirm the claims made in the résumé and during the interview, providing insight into the applicant's qualifications and suitability for the position.

While improving communication, enhancing a résumé's content, and providing a personal statement can be valuable in certain contexts, these aspects do not capture the fundamental purpose of references in the hiring process. The references substantiate the applicant's experience and competencies, making option B the most relevant and beneficial aspect of including references in a job application.