Final answer:
The average litter size for a dogfish shark is between 6 to 12 pups, with 5-7 being the closest answer choice provided.
Step-by-step explanation:
The average litter size for a dogfish shark is generally around 6 to 12 pups, but since that range is not one of the available options provided, the closest correct answer would be 5-7. The spiny dogfish shark, for example, has a reproductive cycle that is one of the longest known among sharks, and they can carry their young for up to two years before giving birth.