Which of the following best exemplifies moral hazard?

1. When quality can be judged by buyers, only owners of high-quality used cars offer their cards for sale.
2. People are willing to by a $1 lottery ticket to get a small chance at winning a large jackpot, even though the expected value of the chance is less than $1.
3. Sellers of high-quality products are willing to offer product warranties.
4. Bank load officers are more likely to make risky loans if their depositors' money is federally insured.