Final answer:
Beethoven's Symphony No. 5 begins in C minor and ends in C major, reflecting a journey from darkness to light that is a hallmark of this famous classical piece.
Step-by-step explanation:
The Symphony No. 5 by Ludwig van Beethoven is a cornerstone of classical music and is known for its distinctive four-note opening motif. When addressing the key areas of Beethoven's Symphony No. 5, the correct description is that the symphony begins in C minor and ends in C major. This transformation from the dark and dramatic tone of C minor to the triumphant and heroic C major is a defining characteristic of the composition and contributes to its enduring popularity and emotional impact.