What concrete evidence does the author provide to prove that acupuncture works? a) studies documenting the effects of acupuncture b) the history of acupuncture in the united states c) descriptions of how people respond to acupuncture d) an explanation of traditional chinese medicine

the correct answer is A

Explanation:

The fact that studies have been done to document the effects of acupuncture is correct. None of the other choices, though they are included in the article, provide evidence that can be accounted for . They merely provide information to help readers understand what it was not how it actually worked

A)Studies documenting the effects of acupuncture

Explanation:

The fact that studies have been done to document the effects of acupuncture is correct. None of the other choices, although they are included in the article, provide evidence that can be measured. They merely provide information to help readers understand what acupuncture is, not whether it works.

dependent clause!

example: "before the food gets cold"