阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。
A
Fat and shy, Ben Saunders was the last kid in his class picked for any sports team. "Football, tennis, cricket — anything with a round ball, I was useless," he says now with a laugh. But back then he was the one always made fun of in school gym classes in Devonshire, England.
It was a mountain bike he received for his 15th birthday that changed him. At first he went hiking alone in a nearby forest. Then he began to ride the bike along with a runner friend. Gradually, Saunders set his mind on building up his body, increasing his speed and strength. At the age of 18, he ran his first marathon.
