The answer is oxygenated.
Just tell them because if you keep trying to figure a way to tell them what you need to tell them then you will probably get nervous and don't tell them for a while. Just be straight forward i guess.
in 1930, market mead an anthropologist conducted a study to understand the cultural variation in society she chose two groups that lived 100 miles apart and start living with them their names were arapesh and mudugumor on closely examining the society she noticed that there is a huge cultural difference between the societies