<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 47-year-old woman comes to the physician because of a 6-week history of fatigue and low-grade fever. She has no history of serious illness except for a bicuspid aortic valve, diagnosed 10 years ago. She does not use illicit drugs. Her temperature is 37.7C 99.9F. Physical examination shows petechiae under the fingernails and multiple tender, red nodules on the fingers. A new grade 26 diastolic murmur is heard at the right second intercostal space. Which of the following is the most likely causal organism?? A: Enterococcus faecalis, B: Staphylococcus epidermidis, C: Streptococcus pyogenes, D: Streptococcus sanguinis, E: Streptococcus pneumoniae,  <response>: This is a patient with signs and symptoms of infective endocarditis, including fever, murmur, petechiae, and tender subcutaneous nodules. The bicuspid aortic valve is a risk factor. The most common organisms causing infective endocarditis in this setting are viridans group streptococci, especially Streptococcus sanguinis. Enterococcus faecalis can cause endocarditis but is less likely. Staphylococcus epidermidis is a cause of prosthetic valve endocarditis. Streptococcus pyogenes causes pharyngitis and skin infections, not typically endocarditis. Streptococcus pneumoniae can cause endocarditis but is less common than viridans group streptococci.D: Streptococcus sanguinis 