Which of these resources would be the best choice to find background information about the topic of global warming? A. A news article on U. S. gas emissions
B. A research study on the rising oceans
C. An encyclopedia article about the effects of climate change
D. A Wikipedia article about global warming

The correct answer is D. A Wikipedia article about global warming

Explanation:

Background information refers to the basic information you need to know about a topic to understand the basics of it. Additionally, when you look for a source to find background information it is important the sources focus on the topic you are looking for. According to this, the best source about global warming is "A Wikipedia article about global warming" because this focuses on the topic "Global warming" while others such as "gas emissions", "rising oceans" or "climate change" are only related topics to the topic "Global warming" but might not provide you basic information about global warming itself.

what motivates odysseus to tell a lie to the cyclops

often a noun phrase is just a noun or a pronoun:

people like to have money.

i am tired.

it is getting late.