That link shows there is “no rating” by BBB reported as of 5/22/2010. How do people come up with a “D” rating?
There are 13 captures on the wayback machine. (The one for Oct 2011 doesn’t work for me.) At least one of them is a D-.
https://web.archive.org/web/20100419162029*/http://www.bbb.org/new-york-city/business-reviews/training-programs/trump-university-in-new-york-ny-97075