Two chemical reactions are shown:

C + O2 → CO2
CO2 + H2O → H2CO3

Which statement is true?
Both are synthesis reactions.
Both are decomposition reactions.
A is a synthesis reaction, and B is a decomposition reaction.
A is a decomposition reaction, and B is a synthesis reaction.

D. is the answer hope that you

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.