Rick has high blood pressure and decides to try an herbal supplement recommended by his friend. Which of the following questions would NOT have helped Rick scientifically evaluate his friend's recommendation before he began taking the herbal supplement?
A) Has this herbal supplement been studied in a clinical trial by trained medical professionals?
B) If this supplement was studied, who paid for the study?
C) If this supplement was studied, how many people were included as patients in the study?
D) Is this supplement all natural?

D) Is this supplement all natural

Explanation:

Herbal supplements can be defined as the use of herbal or medicinal plants in which they often contains one or more herbs and they are made from plants although not all herbs and supplements are safe especially if such person have certain medical conditions.

Therefore this statement "Is this supplement all natural" would NOT have helped Rick scientifically evaluate his friend's recommendation before he began taking the herbal supplement because the statement does not contain important words that may trigger him to research and scientifically evaluate it due to the fact that even if a supplement is all natural the most important thing to ask is if the herbal supplement been studied in a clinical trial, who paid for it as well as how many people were included as patients in the study are all important statement that can trigger Rick who has high blood pressure to scientifically evaluate his friend's recommendation before he began taking the herbal supplement due to the nature of his illness.

a.) carbohydrates

i believe