Final answer:
The volume of the trunk is calculated using the formula for the volume of a rectangular solid, which in this case is 6 cubic feet.
Step-by-step explanation:
To find the volume of Michael's mom's trunk, we use the formula for the volume of a rectangular solid, which is length × width × height. Given that the trunk is three feet long, two feet wide, and one foot tall, the volume calculation would be:
Volume = 3 feet × 2 feet × 1 foot = 6 cubic feet.
Therefore, the correct answer is A. 6 cubic feet.