You can use audience targeting to show your ads to:
- A) specific websites, based on specific interests
- B) groups of websites, based on specific interests
- C) specific groups of people, based on their interests
- D) specific groups of people, based on their location
Explanation: Audiences: Depending on your advertising goals, you can choose the audience that best matches your customers. To drive brand awareness, use affinity audiences to reach TV-like audiences on a broad scale. To reach as many potential customers as possible with an affinity for a specific product area, you might try adding custom affinity audiences. To reach specific audiences actively shopping for a product or service, use in-market audiences instead.
Read more here: https://support.google.com/adwords/answer/2404191?hl=en