Which Thai television channel, launched in 2015 as a digital platform, specialises in youth-oriented series and is owned by GMM Grammy?

• A One31 ✓
• B GMM 25
• C Channel 3
• D Workpoint TV

One31 (Channel One), launched in 2015 by GMM Grammy, is a major digital TV channel known for youth-oriented content and lakorn series, distinct from its sister channel GMM 25.