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.

There is a common trend for people to indulge in leisure activities. Did you ever watch a video on the Internet? Maybe you used YouTube. YouTube is a Web site where people can share their video. Today, YouTube is an important part of the Internet. However, that wasn’t always true.YouTube started with a young man named Jawed Karim and two friends. One day, Karim was on the Internet. He wanted information about the 2004 tsunami in Southeast Asia. He found news stories about it, but he couldn’t find any videos. This gave Karin an idea. He wanted to help people put video on the Internet. Karim told his friends about this idea. Together, they created a company – YouTube.YouTube become a global success. Millions of people around the world visited the Web site. It was clear to Google, another Internet company, that YouTube had a lot of value. Google made a deal. It bought YouTube for 1.65 USD. As a result, YouTube investors and its employees made a lot of money. The three friends who started YouTube were very big investors. Therefore, they made an enormous amount of money.Karim became very rich, and he continued to work toward his PhD. There was something else he wanted to do. He wanted to help young people go into business. He used money and experience to start a new company called Youniversity Ventures. This company helps young people who have good business ideas. It gives them advice and money to start Internet businesses. Milo is one business that students started with the help of Youniversity Ventures.Milo is a shopping Web site. It helps people find products in stores near their homes. Another example is AirBoB. This Web site helps people find for video conferences. People in different places can use this site to have business meetings.Karim has some advice for students who want to start business. First, find a successful company. Do a lot of research about the company and the top people in the company. There, copy the way they do things. For students who wants to start Internet business, Karim is probably a very good example to copy. (Source. Adapted from http://www.grid.unep.ch/waste/download/waste1213.pdf)

What does the word “This” in paragraph 2 refer to?