“i can drink that straight as if it was water” means that he/she can drink that particular drink like they drink water. like with the same reaction with which they drink water
The answer it's variant A.themselves because it's an indirect object in dative case
Pretty sure it's Desensitization
Go on google for inspiration
Too be honest I did some research on it it says “Every surface on earth absorbs and reflects energy at varying degrees, based on its color and texture. Dark-colored objects absorb more visible radiation; light-colored objects reflect more visible radiation. Shiny or smooth objects reflect more, while dull or rough objects absorb more.”
So either you’re answer gonna be soil