A qualified Roth IRA withdrawal is tax-free, while distributions from a traditional IRA are generally taxable as ordinary income. This is the core distinction tested in choice D. Traditional IRA contributions may be deductible depending on income, filing status, and plan participation, but distributions are generally taxed because the account is funded on a pre-tax or tax-deferred basis. Roth IRA contributions are made with after-tax dollars, meaning the investor does not receive a current tax deduction, but qualified distributions of earnings and contributions may be withdrawn tax-free if the requirements are met. Choice A is incorrect because traditional IRAs are subject to required minimum distributions, while Roth IRAs generally are not subject to lifetime RMDs for the original owner. Choice B reverses the tax treatment concept. Choice C is incorrect because beneficiary designation is not limited to a spouse for Roth IRAs. The SIE outline includes retirement accounts, IRA characteristics, required minimum distributions, and contributions under customer account registrations. It also expects candidates to understand tax-advantaged investment vehicles and account structures. Reference: Section 3.2.2 Customer Account Registrations, retirement accounts, required minimum distributions, and contributions.