D. Because a simple sentence has just one independent clause.
Answer: I think the question asks for which of the sentences in the text state the specific opinion of the author, rather than repeating facts from elsewhere. This sentence is this one:
With these facts in mind, Americans need to begin working on ways to improve the cleanliness of home areas for their cats
You can see that it's a recommendation through the verb "need to".
One good way to calm down is to take deep breaths.
Another is to act out what you are going to say, so that you don't say anything you don't mean to.
hope it helps
Answer:
A. to make an argument or explain a process
B. to write a poem