What is a requirement for aging Vino Nobile Montepulciano?

Aging Vino Nobile di Montepulciano requires that the wine be aged for at least 2 years, with a mandatory minimum of 1 year spent in oak. This aging process is essential for developing the wine's complexity, flavor profile, and character. The use of oak contributes to the integration of tannins and can introduce additional aromas and flavors that enhance the overall quality of the wine.

In contrast, a requirement of a minimum of 1 year in stainless steel does not align with the traditional aging practices for this specific wine, as it emphasizes the use of oak for maturation. The option mentioning a total aging of 5 years exceeds the requirements, which distinguishes Vino Nobile from other Italian wines that may have longer aging protocols. Lastly, aging in glass bottles for 2 years is not a primary aging method for this wine; rather, it typically refers to the final stage of the wine before release. The regulations emphasize the crucial role that oak aging plays in the development of Vino Nobile di Montepulciano, making option B the correct choice.