Before Dialysis, Anthony's body mass was 81-82 kg. After Dialysis, his body mass reduced to 81.65 kg. What caused the decrease in Anthony's mass?
1) The removal of excess fluid from the body during dialysis
2) The addition of extra nutrients to the body during dialysis
3) The increase in Anthony's physical activity after dialysis
4) The decrease in Anthony's calorie intake after dialysis
