Final answer:
The approximate mass of a small mouse is closest to 25 grams, which corresponds with the typical weight range for adult house mice.
Step-by-step explanation:
The approximate mass of a small mouse varies, but among the options provided, the correct answer is (c) 25 grams. Adult house mice typically weigh between 12 and 30 grams.
Given this range, a small mouse would likely be on the lower end of the scale, but 5 grams would be too little and 15 grams is still closer to the mass of a juvenile mouse rather than a small adult. As such, 25 grams is the most appropriate approximation.