Which revision correctly combines these two sentences?
My brother loves his bike. He started riding when he was three.
Abrother loves his bike and he started riding when he was three.
BMy brother loves his bike he started riding when he was three.
CMy brother loves his bike; he started riding when he was three.
DMy brother loves his bike, he started riding when he was three.
My brother loves his bike. He started riding when he was three.
Abrother loves his bike and he started riding when he was three.
BMy brother loves his bike he started riding when he was three.
CMy brother loves his bike; he started riding when he was three.
DMy brother loves his bike, he started riding when he was three.