That is still one choice, with three options…
There are three pairwise choices to make. You need to choose between Option A and nothing. And you need to choose between Option B and nothing. And you need to choose between Option A and Option B. It gets tricky when, for example, you choose Option A over nothing, Option B over Option A, but then realize that nothing is a better choice than Option B. This is why I often end up choosing nothing when I look at the desert menu. The choices are basically: chocolate cake, something mediocre but not likely to cause a fatal heart attack, and nothing. When I’m sober and rational, I end up with nothing. When I’ve had a few drinks, chocolate cake.