When considering the aging potential, what does Gran Reserva imply for Spanish wines?

Gran Reserva for Spanish wines indicates that these wines require longer aging periods before release, both in oak and in bottle. Specifically, red Gran Reserva wines must be aged for a minimum of five years, with at least two of those years in oak. This extended aging process allows for the development of complex flavors, deepened aromas, and greater integration of tannins, contributing to a richer, more sophisticated profile.

This aging requirement distinguishes Gran Reserva from lower classifications like Crianza, which mandates shorter aging times—Crianza wines typically must be aged for a minimum of two years. Therefore, the focus on longer aging is a key indicator of expected quality and depth in Gran Reserva wines, making option C the correct choice regarding aging potential.