Which AVA is characterized by sub AVAs such as Santa Maria Valley and Santa Ynez Valley?

The choice of Santa Barbara as the correct answer is based on its recognized structure of American Viticultural Areas (AVAs), which includes several sub-AVAs such as Santa Maria Valley and Santa Ynez Valley. These specific sub-AVAs are well-known for their unique microclimates and diverse grape varieties, contributing significantly to the overall character and reputation of the Santa Barbara wine region.

Santa Maria Valley is known for its cooler climate, which is ideal for growing varieties like Chardonnay and Pinot Noir, while Santa Ynez Valley boasts a more varied climate that supports a broader range of grape types, including Rhone varietals and Cabernet Sauvignon. This diversity showcases the region's potential for producing high-quality wines, making Santa Barbara a prominent and distinct AVA within California's wine landscape.