I can answer you only 2 of these questions
Answer:
C
Explanation:
it's important to cite sources you used in your research for several reasons: To show your reader you've done proper research by listing sources you used to get your information. To be a responsible scholar by giving credit to other researchers and acknowledging their ideas.
Answer:
spelling is hard for many people, but there are techniques for improving the spelling
Explanation:
Coordinating conjunction is the use of words, or phrases to link or join two distinct ideas in a sentence. Examples include: and, but, when, etc.
