Which of the following is the prophylactic drug of choice for this patient?

A 29-year-old woman with a history of rheumatic heart disease and prosthetic aortic valve presents to her physician for consultation. She is referred by her dentist for prophylaxis before she undergoes an oral surgery next month. She has no history of bacterial endocarditis. She is allergic to penicillin.
Which of the following is the prophylactic drug of choice for this patient?

A- Ampicillin
B- Amoxicillin
C- Azithromycin
D- Gentamicin
E- Vancomycin