Javier Pachon's text on BMX

BMX started in the early 1970s when children began racing their bicycles on dirt tracks in southerm California, drawing inspiration from the motocross superstars of the time. BMX racing was a phenomenon by the mid-1970s. Children were racing standard road bikes off-road, around purpose-built tracks in California . The 1972 motorcycle racing documentary "On Any Sunday" is generally credited with inspiring the movement nationally in the US; its opening scene shows kids riding their Schwinn Stingrays off-road. By the middle of that decade the sport achieved critical mass, and manufacturers began creating bicycles designed especially for the sport.

1)True or false:
a)BMX  was started early 1986: 
b)The inspiration of the children began when they saw the motocroos super stars: 

2)Synonymous:
a)Boys: 
b)Started: 
c)Event: 
d) Gained: 

3)Open questions:
a)Where did BMX start?:  
b)Which was the inspiration ?: 

c)In what place was started practicing BMX ? :