Which chess grandmaster, World Champion from 1985 to 2000, is widely regarded as the greatest player of all time and later became a prominent political activist?

• A Garry Kasparov ✓
• B Anatoly Karpov
• C Vladimir Kramnik
• D Mikhail Tal

Garry Kasparov became the youngest undisputed World Chess Champion at age 22 in 1985 and held the title for 15 years, reaching a peak rating of 2851.