Answer: A)combustion
Explanation: I took the test and this was the correct answer.
Also, it can’t be B because it might look like the oxygen is replacing the hydrogen, but it’s not because it gains oxygen.
It can’t be C because it doesn’t yield one product. You can tell by the plus sign that there are two sections of the product.
Lastly it can’t be a decomposition because it doesn’t start off with one single product initially.
