Read the following context and choose the best option to answer the question.
Context: I just experienced my first earthquake . I ' m at work and it scared the crap out of me . The whole building shook and then we started to sway . Then we all stood in doorways until it was over .
Question: What may be the reason for them being frightened ?
Options: 
- The earthquake had lasted a long time .
 - The earthquake was intense .
 - None of the above choices .
 - The earthquake was causing much damage .


None of the above choices .