OPT:
[A]. was a win-win situation.
[B]. set an example for all the singers.
[C]. first made him become known to the public.
[D]. led many young people to be volunteers.

Read the following article and answer the question. Article: "I would say, no matter what people tell you, anything can happen." That's the message Internet singer Austin Mahone says at We Day, an event for young people in Canada. When he was 14,Austin and a friend began uploading pop songs to musical websites."I was just doing it because we had nothing to do, living in a small town." "I'd check different websites for the hottest songs, and I'd record my own videos," he explains. "That's how people began to find me online."His videos got millions of hits and he signed with a record company. The result was the release of Austin's first album,Junior Year. While it seems like a sudden rise for the teenager, Austin admits the early days were not always fun. He says a lot of people thought badly of him for posting his videos online. Yet _ didn't put him off."I kept working hard. "And the hits on his videos kept coming. Austin's achievement and spirit make him a perfect fit for the message of We Day. After all, Free the Children, the creator of the event, was founded to "enable youth to make changes." Even Austin's unusual rise by way of the Internet fits with the way Free The children works and raises money. Because of Austin, his four million followers will learn about Free the Children. While Austin's presence certainly helps We Day, it's good for him, too. Austin gets to show himself as someone who volunteers his time and talent for a worthy cause and show that he cares about making the world a better place. Question: What Austin did at We Day _ . Answer:
Answer:
[A].