Final answer:
Both configurations of cranial horns are equally common in ceratopsid dinosaurs.
Step-by-step explanation:
In ceratopsid dinosaurs, both configurations of cranial horns are equally common. Ceratopsids are known for their elaborate skull ornamentation, including horns and frills. Some ceratopsids, like Triceratops, had two long brow horns, while others like Styracosaurus had one long nose horn.