The correct answer is D) the organization's website.
The research tool that you should recommend to Audrey to
find out if the organization is currently accepting used
books is the organization's website.
If Audrey has some old books she wants to donate, she first has to search the internet, enter the organization's official website and look for the information needed. There, she could find the best way to help the organization because being the official site, she could find all the information needed, the phone numbers of the people in charge, and many other people who could help her to make the best decision.