Roberto is conducting research about the ethics of confining animals in zoos. Which source on his list is the most credible?
A
a site where people share stories about their experiences in zoos and their feelings about zoosB
a research study published on a university’s website about how being in a zoo affects animalsC
an advertisement for a family vacation package that includes an amusement park and zooD
a blog where a zoo owner discusses everyday life working at a zoo and caring for animals