A. Oh, this can be awkward. I feel you.
We were on a maaaajor budget for our wedding, and were super strict about who was allowed to bring a plus one and who wasn't, but...that's something about our wedding that I regret. A wedding is for the couple, yes, but the best weddings are the ones where the focus is placed on everyone having fun...and for some people, having a plus one is the difference between having fun and feeling kind of miserable.