The answers are letters B and D. They are not soluble in water and the hydrogen-oxygen ratio is different. Good luck!
The answer is Cardiorespiratory Fitness. Hope that helped :)
Respiratory system I think. I MAY BE WRONG.
Hope I helped!
Uncomfortable or squeezing chest pain, back pain, pain in arm(s), lightheadedness, shortness of breath, sweating.
A accusing tones and c resentment and disgust. I believe it means the blame game.