Final answer:
It is unlawful to hunt big game with a 10-gauge shotgun.
The correct answer is A. 10-gauge.
Step-by-step explanation:
It is unlawful to hunt big game with a 10-gauge shotgun. In many jurisdictions, the law specifies that only specific gauges, such as 12-gauge or smaller, may be used for hunting big game. This regulation is in place to ensure the ethical and humane hunting of animals, as larger gauges can cause excessive damage and suffering.
Therefore, if you are planning to hunt big game, make sure to use a shotgun that is of 12-gauge or smaller to comply with the law.