If your license has expired and is still within the allowable grace period, may you continue to transmit on the amateur radio bands?

Answer: D. No, you must wait until the license has been renewed

No, you must wait until the license has been renewed. The grace period (FCC rule 97.21) only lets you renew without retesting; it does not let you transmit with an expired license.

Tip: Grace period lets you renew, not transmit.

FCC rule reference: Part 97.21(b)