Which sentence does not correct this run-on sentence?

Kenny's dad has a collection of guitars sometimes he lets us play them.

AKenny's dad has a collection of guitars; sometimes he lets us play them.
BKenny's dad has a collection of guitars, and sometimes he lets us play them.
CKenny's dad has a collection of guitars, sometimes he lets us play them.
DKenny's dad has a collection of guitars. Sometimes he lets us play them.