Final answer:
The correct answer is Option C. The purpose of 'My Left Foot' is to persuade others to support people with cerebral palsy.
Step-by-step explanation:
The purpose of My Left Foot, based on the excerpt provided, is to persuade others to support people with cerebral palsy. The excerpt mentions that the story is about an individual's experience living with a physical disability, and it reflects on deeply personal events from the author's life. It suggests that the overall message of the story is about something bigger - creating a universal understanding and awareness about cerebral palsy. By sharing his experiences, the author aims to engage and emotionally connect with readers, encouraging them to support people with cerebral palsy.