Exposure is a behavioral treatment for anxiety in which people are confronted, either suddenly or gradually, with a stimulus that they fear. This is sometimes concerning for individuals or family members of individuals that have this condition. However, exposure is a great way to treat anxiety and it will bring you back to how you were before.
The healthiest option would be the cheese because cheese contains both healthy and non-healthy fats, the second best choice would be nuts, although they contain more protein than fat.