Well, it isn't A because there should only be a period at the end of P.M. It isn't C because it has to be a period between M and D.
So, the answer has to be B.
Hope this helps!
I think its because the author wants there tto be more insight from the charactor that you wouldnt get for 2nd or 3rd person. You get to see what is in the charactors mind
The correct answer is D. A concrete example is one that provides a clear situation in which the abstract idea, in this case the author's argument, is exemplified. This option not only prepares the reader for the example, but also gives specific details about what could be regulated.
