It was worder like this: It is a premise for the claim the hot water in the tank losses oxygen, or similar to this... It was choice C as I remember. Do you agree? Another option that I considered was: it is a premise for the argument's main conclusion... but maybe I'm just hallucinating this answer
yes.. I remember that this answer was towards the end of the list. I put down that it was a premise for the conclusion which is supported by additional information? I think it was C or D. I think I put D... but I was debating C.
lack of oxygen -> unsuitable cooking water, sitting in a hot water heater -> lack of oxygen
I was able to combine them most successfully as sitting in a hot water heater -> lack of oxygen -> unsuitable cooking water