Under Massachusetts law, when is it legally permissible to use a firearm in self-defense?

Massachusetts law allows the use of a firearm in self-defense only when there is a reasonable belief of imminent danger to life or of great bodily harm. This means that options A, C, and D are incorrect.

Option A is incorrect because Massachusetts law only permits self-defense with a firearm within your own home if there is an imminent threat to life or great bodily harm.

Option C is incorrect because verbal threats alone do not constitute imminent danger to life or great bodily harm, and therefore do not justify the use of a firearm in self-defense.

Option D is incorrect because Massachusetts law does not allow for the use of a firearm in all public places, even if the person is legally carrying the firearm. The use of a firearm in self-defense is only permissible in certain situations, such as when there is a reasonable belief of imminent danger to life or of great bodily harm.