The answer would be letter A
If combined with oxygen. the reaction is usually combustion. in this case, it is the combustion of ethene
Make an observation.
Ask a question.
Form a hypothesis, or testable explanation.
Make a prediction based on the hypothesis.
Test the prediction.
Iterate: use the results to make new hypotheses or predictions. Hope this helps
The think that happens to the number of carbon atoms in each compound is that they increase by 1
