You're doing research for a paper on heart transplant surgery that is due on march 1, 2012. you have found information on this site (the above screenshot): evaluate this site and choose the answer that best reflects why you should (or should not) use it as a source.

Although the screen shot is not included, I found from research that it's a picture of MedlinePlus (see attached image). Also options are not given, but from my understanding, the answer to the question is: The domain of the site is ".gov" and this lends some credibility. Furthermore, MedlinePlus is a service of the United States National Institutes of Health, so the information on the site should be reliable and current.

The answer is letter a or the first option