A student has made a plan for research. Read the plan and the directions that follow.

Research Report Plan
Topic: Bengal tigers
Audience: eighth grade science class
Purpose: to inform
Research Question: What has caused the Bengal tiger to become endangered?

Select the credible, or trustworthy, source that will most likely provide the information needed to answer the research question.
A.

a dictionary that contains an entry for "tiger"
B.

a complete printed list describing all the thriving species that live in the same habitat as the Bengal tiger
C.

a research report completed by a high school student on Bengal tigers several years ago
D.

a comprehensive listing published by a national scientific organization that describes each animal marked as endangered that explains which animals are endangered and why

Out of the given options, the most credible and trustworthy source that will likely provide the information needed to answer the research question is option D - a comprehensive listing published by a national scientific organization that describes each animal marked as endangered, explaining which animals are endangered and why. This source will provide a comprehensive overview of the reasons why the Bengal tiger has become endangered.