When writing dates in long format, there should be a comma after the day of the week and a comma after the specific date. You should also note that the whole words should be used, especially when you aim for the formal tone of writing. So looking at your choices, you can rule out B, C, and D.
The correct answer would be A. Monday, November 12, 2004.
I would recommend reading over the lines many times and remembering the cues. You could make flash cards with one side having the cue and the other with the line.
