Answer:
I think the answer is A because it's giving a warning.
I read the whole poem but what is the question? I will be happy to answer it for you if you tell me the question.
A periodical index<span> contains citations for articles in magazines, journals, and newspapers which can be retrieved through searching. Some </span>periodical indexes<span>also include abstracts (brief summaries) of the articles and sometimes even the full text or entire content of articles as they originally appeared. You're welcome ;)</span>
