Final answer:
Earnings on investments within qualified plans are tax-deferred.
Step-by-step explanation:
In qualified retirement plans such as a 401(k), annuities can be chosen as a funding vehicle. Annuities are a type of investment product that provide a series of regular payments over a specified period of time. In the context of qualified plans, one of the true statements about them is that earnings on investments within qualified plans are tax-deferred. This means that the growth of the investments in the plan is not subject to income taxes until they are withdrawn.