[单选题]
10.01: The very first PhysicsBo vh-+rvnhx19r 9z 5xkvwl took place in 1985. Approxup 54ivl h,pt4 xxdx9+dy /t wit,o.-cimately how many second .xx,o iwt 4cpy t-5dx+t vud,phi/9l4s ago did students compete in this first contest?
A. $10^2$
B. $10^5$
C. $10^7$
D. $10^9$
E. $10^{12}$
