Final answer:
Cervical headgear is used to correct a prognathic maxilla, decreasing lower face height, and increasing overbite, making option B the likely Class II Division 1 malocclusion that can be corrected with this orthodontic appliance.
Step-by-step explanation:
The Class II Division 1 malocclusion most likely to be corrected with a cervical headgear is option B: Prognathic maxilla, decreased lower face height, increased overbite. Cervical headgear targets the maxilla (upper jaw), and is designed to apply pressure to correct its position. In the case of a prognathic maxilla, where the upper jaw is too far forward, the headgear can help to restrain its growth and improve the dental bite, working as part of orthodontic treatment.
This appliance is less appropriate for cases with retrognathic maxilla or mandible, as in options A and C, since these may require advancement rather than restraint. A prognathic mandible often requires different treatment modalities, making option D less suitable for treatment solely with cervical headgear. Retraction and depression of the maxilla are some of the movements that can be assisted with the use of cervical headgear.