All of the answers would be correct,
hope this helped!! <span />
Basically no one knows that an earthquake is coming until it's happening.
People don't have time to evacuate because they don't know that an earthquake is going to take place , in other words the earthquake takes them by surprise.
First generation: 4 students.
Second generation : 16 students ( or 4^2 )...
Fifth generation: 4^5 = 1,024
Answer: For 5 generations 1,024 people will know this art.