What can you conclude based on your observation of the pictured glucose (dextrose) fermentation test?

I found the exercise on the internet and attached is the glucose (dextrose) fermentation test mentioned.
It can be concluded that the organism can't ferment glucose. In this test, if the organism ferments it is produced acid turning the medium more acidic and making its colour turn yellow, which is not verifiable. It can also be concluded that there wasn't production of any gases as there wasn't any metabolic activity.

Volcanoes make new rocks so not ahotspots are the the stuff that makes volcanoes mid atlantic ridge(mar cause i’m lazy) is a constructive plate boundary so it makes sense that new rocks would be found near it, also the mar is in the middle of the ocean so it fits the description deep ocean trench, umm, there’s no ocean trenches to where you’re goingso the mar is most likely the answeri wouldn’t trust me but hey why not