A 9-year-old child presents with fever and migratory arthritis involving knees and ankles two weeks after a sore throat. Examination reveals a new holosystolic murmur at the apex. Which pathological lesion is most characteristic of the cardiac involvement in this condition?
A
Rheumatoid nodules in myocardium
B
Aschoff bodies with Anitschkow cells
C
Suppurative bacterial vegetations