The correct answers are C. Academic Journals and D. Research papers by experts.
Step-by-step explanation:
Credible information sources are sources that can be believed as these are usually objective sources not guided by prejudices, support with appropriate information and the information is true. Generally, research papers and other academical papers will need to use other sources to support the author's ideas; additionally, whether a source is credible or not depends on the author as it is recommended to use sources created by experts on the subject; sources from reliable databases such as academic web pages or academic journals as these have standards that guarantee the information of articles and other documents is reliable; also, sources should be updated; contain information that is supported and relevant for the purpose of the research paper. Due to this, the sources from the list that are credible are academic journals as these are formed by high-quality articles with accurate information and experts on the subject and research papers by experts as expertise makes information more likely to be true. On the other hand, other sources on the list are not written by experts and therefore are not credible.