Choose the option that correctly sequences the following sentences.

1. To his horror, Harris realized that he was looking at a person on fire.

2. Last year, Derrick Harris was driving his 18-wheel truck down a highway when he spotted a fire ball in a drainage ditch.

3. The victim, a homeless man who had been set on fire, suffered severe burns.

4. The 36-year-old pulled his truck over, grabbed a blanket, ran to the man and smothered the flames.

5. Curiously, the fire seemed to be moving.