I am absolutely sure that these lines from the Declaration of Independence are an example of the use of purpose. I consider this option as a correct one becaue, according to the definition of the purpose as a literary device, it is a tool which expresses the <span>reason which author wrote a particular article and so on. As for me, this option is the most suitable.
Hope that will help!
</span>
The linking verb is BEEN.
"Everything that was said to me I seemed to have heard before, and I could no longer listen. I could no longer sit in little bars near Grand Central and listen to someone complaining of his wife’s inability to cope with the help while he missed another train to Connecticut."