Final answer: The landmark case, Baker v. Carr (1962), asserted federal courts' jurisdiction to hear constitutional challenges to states' redistricting plans, leading to option b: 'created a one-person, one-vote standard for reviewing congressional districts', best reflecting the case's outcome.

Which of the following correctly describes the facts in Shaw v. Reno (1993) ? Redistricting in order to confine minority voters to a majority in one district was challenged under the Fourteenth Amendment.

The answer is D. The Supreme Court ruled that the redistricting plan was unconstitutional as it relied on race as the predominant factor in drawing the district lines, violating the Equal Protection Clause of the Fourteenth Amendment.