Which sentence contains an unclear pronoun?
A.
After Archie crashed his bike into the fence, the bike and the fence both needed repairs.
B.
Although Rowan was an accomplished sculptor, his daughter never became interested in sculpting.
C.
Amber bought her dad a Swiss watch because she had heard that they make the best watches.
D.
Paul and Kelly left their dogs at the kennel, but then they worried that their dogs would be homesick.