What type of cheese is typically used in mushroom jack fajitas?

Mushroom Jack Fajitas are characterized by the use of mixed cheese, which often includes a combination of Monterey Jack and cheddar cheeses. This blend provides a creamy texture and mild flavor that complements the sautéed mushrooms and other ingredients in the dish. The synergy between these cheeses enhances the overall taste and richness, making it an appealing choice for fajitas.

In this context, mixed cheese is the right answer because it captures the essence of how a variety of cheese can enhance the dish's profile. Other types of cheese listed, such as cheddar, blue, or feta, while delicious in their own right, do not commonly match the specific cheese blend used in Mushroom Jack Fajitas at Chili's.