Answer:
C. complete subject
Explanation:
A compete subject is a group of words that performs the action in a given sentence. It answers the question, "who", "what", etc.
Therefore, from the sentence, "(Most of the passengers) received their refunds within a week*, the words in bracket is a complete subject.
I would select the answer “ploughed”
Answer:
holding together all the ideas
setting up subtopics of the essay
stating the main idea of the essay
Explanation:
So B,C, and D like she/he said
Not sure because you didn't provide enough information