What are the two key PGI wine regions of Central Portugal?

The correct answer highlights the two key PGI (Protected Geographical Indication) wine regions of Central Portugal. IGP Lisboa and IGP Tejo are both important in the context of Central Portugal's wine production.

IGP Lisboa, also known as the Lisbon region, encompasses a variety of terroirs and climates that contribute to a diverse range of wines. This region is becoming increasingly significant in Portugal's wine landscape due to its proximity to the Atlantic Ocean, favorable growing conditions, and the ongoing modernization of winemaking practices.

IGP Tejo, located near the Tejo River, also benefits from a range of climatic influences that allow for the cultivation of several grape varieties. The region's winemakers leverage the unique geographical characteristics to produce wines that are gaining recognition for quality and value.

In contrast, the other options may include valid regions or designations, but they do not specifically represent the two key PGI wine regions of Central Portugal as required by the question. Understanding the geographic and climatic significance of these regions helps to clarify their prominence in the Portuguese wine industry.