Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.

Video gaming is a very popular form of entertainment in the world. Both girls and boys play video games regularly, mostly for fun. There are also new ways to make a living out of video games, from making their own games, broadcasting live online, to playing professionally in packed stadiums.

Alex Balfanz is an 18-year-old student. Every day he has lectures or seminars, and assignments to do at home. Like many students of his age, he spends a couple of hours per day on video games. But he’s not just playing them – he’s making them, and making a lot of money, too. “In the 10 months that Jailbreak has been released, it has already produced seven figure profits,” Balfanz says. Today, it has been played for the billionth time.

Kyle Mayers left college in 2020 and struggled to find a job during lockdown. Then he began playing the football video game Rocket League and found that he had a lot of viewers watching him play. His followers enjoy watching him defeat challenges or asking for tips and advice for their own gaming adventures. Now, Kyle usually logs in around 7 p.m. every night playing games, and earns just over £1,000 every month. 

Sumail Hassan is the youngest gamer to win $1 million in eSports winnings. He’s made more than $2.5 million playing Dota, an online multiplayer game. He calls it a full-time job. He’s 19 now but has been gaming since he was seven. According to Hassan, it’s not easy to be a professional gamer. He has to practise for ten or more hours a day, five or six days a week. He also studies videos of other players and plan ways to beat them.

The pronoun ‘it’ in paragraph 4 refers to ______________.