What is the most popular wine varietal produced in California?
California is best known for its white wine, Chardonnay, and its red wine, Cabernet Sauvignon.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What is the most popular wine varietal produced in California?
### Input: 
### Response: California is best known for its white wine, Chardonnay, and its red wine, Cabernet Sauvignon.