repeated mesurement can reduce the error
it is true
if you take any mesurement repeatedly and the average is taken, the error will be less
The most important information in the MSDS that is useful at the end of an experiment is how to manage or dispose of the waste materials of the experiment. This is important especially if the materials used are toxic. They cannot just be disposed in the sink or the trash bin. They must be disposed in a waste bottle or other methods.
Our Earth budget is how much energy we receive from the sun.
So the best answer is A
Water doesn't belong on that list.
If it's removed, then there's a space to add GAS, which does belong.
B is the answer to your question
