Reaction 1 and reaction 2 each generate a gas. In every case, the total volume of gas produced is recorded at 1 minute intervals for $10$ minutes. The results are displayed on a graph. Which row states how the rate of reaction changes, if at all, throughout each reaction?
- Areaction 1: the rate is constant; reaction 2: the rate decreases after 2 minutes
- Breaction 1: the rate increases; reaction 2: the rate increases
- Creaction 1: the rate increases; reaction 2: the rate decreases after 2 minutes
- Dreaction 1: the rate is constant; reaction 2: the rate increases