Answer:
saying that Christmas cards are on the decline because of social media
Answer:
oh so sad it is very easy read books
Woah, I'm surprised this hasn't been answered yet! Hey, maybe I can still help??
Using "Or" for a beginning word in a sentence is not really needed.
But I think it is possible in my opinion--
Ex: I'd like my applications turned in by today. Or, rather tomorrow is okay.
Though, it does not really flow well with the sentence and is ultimately looked over as an odd way to use your words. Maybe even it is considered technically wrong by English usage technicalities. I think the safest answer is to say "Or" should not be used in that order.
The answer would be 'C' But. If you have a question like this again, just remember that it is always the word after the comma!