SAT English Practice Question

The author's central claim is that the practice of mindfulness can have a positive effect on the brain. The author develops this claim by discussing the brain's response to stress and how the practice of mindfulness can help to reduce the effects of stress. This claim is supported by the author's use of a personal anecdote about how mindfulness has helped them cope with stress. Which sentence most clearly expresses the author's central claim?

1. A.Mindfulness is a practice that involves focusing on the present moment and accepting thoughts and feelings without judgment.
2. B.When we practice mindfulness, we are training our brains to be more aware of our thoughts and feelings.
3. C.Practicing mindfulness can help to reduce the negative effects of stress on the brain.
4. D.The practice of mindfulness has been shown to have a number of benefits for both mental and physical health.