Which type of IRA has a maximum annual contribution limit of $6,000?

The correct answer reflects that both the Roth IRA and the Traditional IRA share the same maximum annual contribution limit of $6,000 for individuals under the age of 50, as of the relevant tax year. This amount represents the standard limit set by the IRS for contributions to these types of individual retirement accounts.

Individuals over the age of 50 are allowed to make catch-up contributions, increasing their maximum limit to $7,000. This limit is designed to promote savings for retirement while providing tax-advantaged growth for the accounts.

While other types of IRAs, such as the SEP-IRA, have different contribution limits based on self-employment income or business earnings, the Roth and Traditional IRAs specifically align on this $6,000 limit for regular contributions, making option D the correct response.