Final answer:
Rheumatic fever is characterized by joint pain and inflammation, commonly affecting children and involving the cardiovascular system. Antibiotics are used as treatment, while respiratory symptoms are not typically associated with the disease.
Step-by-step explanation:
Rheumatic fever is characterized by joint pain and inflammation, making option A correct. Skin rash (option B) is not a characteristic symptom of rheumatic fever. Rheumatic fever is common in children (option C) and can cause cardiovascular involvement (option F). The disease primarily affects the heart valves and not the liver (option D). Antibiotics are used to treat the underlying streptococcal infections that can trigger rheumatic fever, so option E is also correct. Respiratory symptoms (option G) are not typically associated with rheumatic fever.