Which of the Following People Is Not Demonstrating Unrealistic Optimism

Which of the following people is not demonstrating unrealistic optimism?

A) Zhenya, who drives aggressively because she knows she can handle her car well.
B) Joy, who engages in unsafe sex but always asks her partners if they are disease-free.
C) Betty, who thinks she will get a scholarship because she is her school's valedictorian.
D) Yuri, who knows he won't get cancer because he doesn't smoke.