When Lori Was Diagnosed with Breast Cancer,the Doctor Recommended a Lumpectomy

When Lori was diagnosed with breast cancer,the doctor recommended a lumpectomy followed by radiation therapy.Lori underwent the prescribed treatment recommended by the doctor.However,she also continued to eat lots of fruits and vegetables,walk three miles every day,and complete a daily yoga practice.Within about three months Lori was cancer-free.Afterward,Lori told everyone that her healthy lifestyle had helped to cure her.Is this conclusion reasonable given the circumstances?

A) No, a healthy diet and exercise regimen can never help cure cancer.
B) No, there are too many confounding factors to know exactly what happened.
C) Yes, the healthy diet and exercise regimen definitely helped to cure her.
D) Yes, this evidence very strongly supports the hypothesis that a healthy diet and exercise regimen probably helped to cure her.