2. Read the paragraph and answer the questions.

(Đọc đoạn văn và trả lời câu hỏi)

My favorite fad was the Angry Birds game. which was very popular a few years ago. It was very easy to play and the graphics were beautiful. The music was fun, too. I think that’s why it was so popular. I downloaded the app and used to play the game for hours. Most of my friends knew and played the game, too. When we hung out, we used to compare our scores and talk about how to solve a difficult level. There was even a movie based on the game.

a. What was the fad?

b. Why was it popular?

c. What does the writer remember doing with his friend?

d. What did people make based on the fad?