Echinacea Purpurea,often Found in Cough Drops,was Shown to Be Effective

Echinacea purpurea,often found in cough drops,was shown to be effective in which of the following?

A) reduction of the severity and duration of colds in children
B) prevention of evolution of the influenza virus
C) reduction in the symptoms of arthritis and fibromyalgia
D) lessen the symptoms of flu and colds in adults
E) reduces the symptoms of bipolar syndrome