Which extreme sport, born in California in the 1950s and popularised by surfers on windless days, was added to the Olympic programme at the 2020 Tokyo Games?

• A Surfing
• B Skateboarding ✓
• C BMX freestyle
• D Sport climbing

Skateboarding's journey from counterculture pastime to Olympic sport reflects its mainstream acceptance, with Tony Hawk's 1999 landing of the 900 being a landmark moment.