Lamont Is Walking Through His Local Health and Nutrition Store

Lamont is walking through his local health and nutrition store.An employee comes up and asks if he needs any assistance.Lamont asks what the most effective and cheapest memory-enhancing herbal remedy they have is.If the employee answers this question based on the evidence from controlled,scientific research,he or she would recommend

A) gingko.
B) any sugary liquid.
C) lemonade.
D) Prozac.