Mary has followed traditional Chinese medicine for decades. When she moves into an assisted living facility, she leads a tai chi class for interested residents. She prefers to use herbal remedies to maintain balance of her chi, but she also follows a healthy diet, takes a daily walk, and practices yoga. What health approach is Mary's lifestyle based on?

a. Scientific approach
b. Alternative therapies
c. Complementary therapies
d. Adjunctive therapies