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</span><span>a. judicial review
</span><span>
To oppose a presidential or legislative act, the judiciary may recover a judicial review, in order to show how such a measure is unconstitutional and, thus, can not be made official.
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During<span> the high </span>Middle Ages<span>, the </span>Roman Catholic Church<span> became organized into an elaborate hierarchy with the pope as the head in western Europe. He establish supreme power.</span>
<span> the Himalayan mountains was in the way as this acted like a barrier </span>
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Answer:
Evidence, clues, or pieces of the past
Explanation:
They need some way of knowing, so they study evidence,clues, and pieces of the past to figure out history.