When a 4-Year-Old Boy Stands Erect with His Medial Malleoli

When a 4-year-old boy stands erect with his medial malleoli touching, the distance between his knees is 2 inches. What is the child's most likely diagnosis and treatment?

A) Genu varum, which can be treated by bracing
B) Flatfoot, which will require orthopedic shoes
C) Genu valgum necessitating a series of surgeries
D) Femoral torsion, which will spontaneously resolve before puberty