If it's written in first-person then yes, the narrator could even be the main character.
Answer:
Dear _________________,
My parents are inviting friends and family to their wedding anniversary party, and they can't seem to think of any one else to invite, so they asked me. So, I was wondering if you'd join me at their party? I would really appreciate it!
Sincerely,
______________________.
The correct answer is A. We practiced for the debate and many arguments were rehearsed.
As you can see in this sentence, in the first part the pronoun <em>we </em>is used, and in the latter part, that pronoun just disappears and the sentence suddenly becomes passive rather than active. The shift isn't done properly - it is rather awkward. The other options are consistent - they use only one voice rather than two (like in sentence A).
Most likely A.
In this case a simple statement could be any of those, to shorten to the simple statement you would generalize :)
<span>A) although
B) for example
C) in other words
D) on the contrary
</span><span>B) for example </span><span>
Have a nice day! :)</span>