Answer:
3. Donate her time and money to help others in her community or around the world to try and make a difference.
Explanation:
High subjective well being of a person is determined by the level of satisfaction one has about his life. It includes both cognitive and affective domains of a person. It is determined by three components that are: life satisfaction, positive affect, and negative affect. When a person enjoys a high level of life satisfaction with greater positive affect and less negative affect he is said to have a high level of subjective well being.
Option third add value to the life of Sandra and therefore reflects her high level of subjective well being.