The power of judicial review allows the Supreme Court to A. overturn an act of Congress that violates the Constitution.
B. make lifetime appointments to other federal courts.
C. establish legal qualifications for future Supreme Court justices.
D. refuse to hear cases that it views as unimportant.

The correct response is Option A: Overturn an act of Congress that violates the Constitution.

Explanation:

The power of judicial review gives the Supreme Court of the United States the power to overturn any executive or legislative act that it considers unconstitutional.  An example of when the power of judicial review was used is in the case of Roe vs. Wade where SCOTUS decided it was unconstitutional to restrict access to abortion. Option D is also a power held by the Supreme Court, but it is not really encompassed specifically in the question of judicial review.  This is another power the Supreme Court has where it has the discretion to decide on the cases that are presented. Four of the nine judges have to vote to hear a case for it to go forward.  This is called a writ of certiorari. The Supreme Court can request that lower courts send a particular case to them for review.

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the answer would be in this answer. someone already asked the question.