He was unable to prove his theory because he didn't have any proof.
World Health Organization
<span>In 1975, after much debate, Congress passed the Indian Self-Determination and Education Assistance Act .
B)
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Answer: Madison, legal case in which, on February 24, 1803, the U.S. Supreme Court first declared an act of Congress unconstitutional, thus establishing the doctrine of judicial review.
Explanation:
Impeding - to delay or prevent by obstructing it/them.
so your answer is B. Obstructing; slowing down.
