1. Rugby has only been played at 4 of the first 7 olympics. Golf has only been played at the 1900 and 1904 olympics. If you're going to include discontinued events, you should include polo, baseball and softball.
2. "Show jumping" should be an acceptable variation of "jumping"
3. "Track" should be an acceptable variation of "athletics"
2. "Show jumping" should be an acceptable variation of "jumping"
3. "Track" should be an acceptable variation of "athletics"