The correct answer is A) apply and interpret the Constitution in legal cases.
Court decisions affect the Constitution because the courts apply and interpret the Constitution in legal cases.
The Supreme Court of the United States is the highest court in the nation. That is why the best and most qualified judges are part of the Supreme Court. It deals with cases and controversies arising from the Constitution and can interpret the laws. The Court must provide justice for all the American people, that is why the Supreme Court plays a key role as the protector of the US law and is the one to interpret the US Constitution.