Respuesta :
The right answer is A. The request and intention expressed and the overall job experience as well are presented in a professional manner. The proper and professional way to express one's interest in a job opportunity is writing a CV (curriculum vitae), and it must include a complete description of the job experience and other personal and professional information.
A-Professional is the tone.
I am writing to express my interest ( This is formal and suits this situation.) in the cashier position ( formal) at Fletcher's Books. I have several years of experience in customer service roles and believe my qualifications meet the needs of your company. ( This is also a formal expression suitable for applying for a job).