The quotes that support the central argument of the passage are the ones that justify that argument, showing it to be true.
In short, the quotes will be those that prove the argument and strengthen it.
You did not show the text the question refers to. This makes it impossible for me to write a specific answer, but I hope the above information will help you.
More information about support sentences in the link:
https://brainly.com/question/17176690