Choose the option (A, B, or C) that best completes each numbered blank in the passage. (10 points) Skateboarding (6)_________ back to the 1940s and 1950s in California as a replacement to surfing waves in unfavorable weather conditions. The (7)_______ of the first skateboard was unknown. However, one thing was known for sure. The first skateboard was made from wooden boxes or boards wheels on the bottom. Skateboarding reached its (8)________ in the early 1960s. Then attraction towards the end of the decade. Numerous improvements have been made to skatboards (9)_________ safety reasons. Millions of teenagers (10)________around the world now. $\\$ $\\$ 6. A.dates B. starts C. originates $\\$ 7. A. inventor B.discoverer C. customer $\\$ 8. A. width B. depth C. height $\\$ 9. A. by B. for C. because $\\$ 10. A. have skateboarded B. are skateboarding C. skateboarded