Final answer:
The monthly fee for internet service, after deducting the setup fee, would be $24. However, as this answer isn't an option, it suggests the presence of a rounding error or issue in the question's setup. The closest available option is $25.
Step-by-step explanation:
The question asks for the calculation of the monthly fee for internet service after accounting for the setup fee. The total annual cost for the service is $303, which includes a one-time setup fee of $15. To find the monthly fee, we first subtract the setup fee from the total annual cost, which results in $303 - $15 = $288.
Then, we divide $288 by 12 months to get the monthly fee. Therefore, the monthly fee is $288 / 12 = $24 per month. However, this answer is not one of the options provided. The nearest possible choice is option b) $25, which suggests a rounding or a slight discrepancy in the provided options or the setup for this problem.