Rationale for Correct Answer

The correct answer is: Ginseng

Placebo-controlled trials have found significant associations between certain herbs and clinical improvement in MS. Ginseng is associated with less fatigue and greater quality of life; frankincense, with improved memory; tea extract, with increased muscle metabolism during moderate exercise; cannabis stevia, decreased spasticity, pain, and muscle stiffness; and primrose oil and hemp, with decreased EDSS scores and relapse rate.

References:
Mojaverrostami S et al. Adv Pharm Bull. 2018;8:575-590.