What Is the book not enough info
Are there supposed to be options?
Anyhow, you use quotation marks when you're quoting another person or when you're quoting a phrase. Also, you can use it when a person(s) are speaking. An example would be..
Rosa said, "Mac and cheese is the best food on earth."
Or
Rosa said, "Mac and cheese is the best food on earth." Henry gave a look of disgust and said, "I disagree. Pizza is the best food."
I think the answer is B. Since this *is* about a plant.
I believe the answer your looking for is the west nile virus <span />