What does the "mush" test involve?

The "mush" test is primarily concerned with the texture of the food, particularly how it responds to pressure. In this test, applying light pressure to the item being evaluated should yield slight resistance, indicating that the food has the right texture and is properly cooked. This slight resistance demonstrates that the food maintains its structural integrity and is not overly soft or mushy, which would indicate overcooking or improper preparation.

The other options suggest different aspects of food quality but do not capture the essence of the "mush" test. For instance, checking for an oily texture pertains more to assessing greasiness rather than texture integrity. Observing the color of the fries relates more to visual appeal than to their softness or texture. Testing for crispiness specifically measures the crunch factor rather than responding to pressure. Therefore, the correct answer accurately reflects the key focus of the "mush" test, which is centered on the tactile experience of the food when light pressure is applied.