The main purpose of the last line of the passage is to signal the reader that steps will follow.
In the first part of the passage, the author is giving some <em>background information</em> about the topic, which functions as an introduction to develop the main topic. The last sentence serves <em>to trigger</em> what the passage is actually concerned in, that is, the different ways in which contamination by this bacterium can be avoided. Thus, what the reader is expecting after the last line are some steps to follow.
Answer:
A narrative essay is writing a story about the best, worst, or strangest thing that ever happened to you. Like a family vacation. Only focus on event ot travel experience.
I would definitely go with C. a topic sentence. While A. is never a bad idea, essay paragraphs tend to get marked as off topic if there is not a topic sentence. Hope this is helpful!
"third"
President Reagan signed the proclamation officially declaring that the 3rd Monday of the first month, January, be the MLK Jr. Day.
Statistics since it’ll show corroborative data