The correct answer is B. A website that hosts scientist' peer-reviewed studies
Step-by-step explanation:
The word credibility refers to whether the information of a source can be believed and trusted or not. For determining the credibility of a source there are different factors you need to consider, this includes the authors of the source as it is recommended they are experts in the topic; the date of the source as the information can be outdated and in the cases of web pages whether the information has some control or review that avoid any information to be included. For example sources such as blogs created by someone who is not an expert on the topic are not credible as the author might not know completely about the topic and there is no control over the information being posted that guarantees the information is true.
Considering this, in the case of writing a project that focuses on primate research efforts in the U.S. the most credible source is "A website that hosts scientist' peer-reviewed studies" because in this case the authors are experts on the field; their studies are probably based on research which made them credible as they follow strict procedures and there is a control on the information which is the "peer-review".