Tutter - Would you mind PMing me with the name brand of the test kits with which you've had good luck? Thanks! Do you make chamomile tea with your flowers?
Oakland - Thanks yet again for your terrific guidance! Yes, the thicker stem is the one that had the flowers and the most growth. And yes, it's always painful to remove potential tomatoes!
Please help me understand *why* you've selected the two stems for removal so that I might take in some of your wisdom.

The little one that's hidden in the back seems logical - it's small, fairly new, and has little growth. Makes perfect sense. I've already taken that one out.
But, as for the other two, I can guess a couple of reasons, but I'd like to hear your thought process in your reasoning so that I fully understand. Here are my guesses -
The one you've chosen to keep is in the middle, so it could conceivably replace the middle stem. Yet, it's base is further up the main stem than the one you've selected for removal. It has lots of new growth, but the growth is still quite small.
The one that you've selected to remove is further to the left, so if it were kept, it'd leave nothing in the middle of the plant, with no clear middle stem. Yet, it's lower on the main part of the stem than the one you've elected to keep. And, it's also thicker. It is also taller than the one you chose to keep, with bigger leaves, but less new growth.
When I trim off the next stem, I'm going to attempt to root it. I had great luck with that last year, so if I'm as lucky with this, I'll get an opportunity to grow a Marianna's Peace WITH a proper middle stem!