Final answer:
The tax reduction resulting from an RRSP contribution is calculated by multiplying the contribution by the marginal tax rate. In this student's case, assuming an unspecified maximum RRSP contribution, the marginal tax rate of 40% would be applied to this amount. However, without the specific RRSP limit, the exact tax savings cannot be determined.
Step-by-step explanation:
The student's tax reduction question is about understanding how marginal tax rates work and applying this understanding to calculate the tax savings from an RRSP (Registered Retirement Savings Plan) contribution. The marginal tax rate is the rate of tax you pay on your highest dollar of income. In this scenario, a 40 percent marginal tax bracket would mean that any additional income above the student's current earnings would be taxed at 40 percent, but this does not apply to income that is already within lower tax brackets.
To calculate the tax savings from the full RRSP contribution, one would apply the marginal tax rate to the amount of the contribution. Since the marginal tax rate is 40 percent, the tax savings would also be 40 percent of the amount contributed to the RRSP. If we are assuming the contribution is at the maximum limit allowed, without specifying the limit itself, we would simply multiply the RRSP contribution by the marginal tax rate of 40 percent.
Without the exact RRSP contribution limit, we cannot complete the calculation for this case. However, typically the tax reduction would simply be the RRSP contribution multiplied by the marginal tax rate, which in this case is 40 percent. Considering the possible options provided, if the full RRSP contribution were $30,000, for example, the tax savings would indeed be $30,000 x 40% = $12,000, leading to option D being correct. But since we lack the precise RRSP contribution limit, we cannot confidently state the answer.