The table shows the initial and final temperatures of four different chemical reactions.
| Reaction | Initial temperature (∘C^\circ\text{C}∘C) | Final temperature (∘C^\circ\text{C}∘C) |
|---|
| A | 21.5 | 18.2 |
| B | 21.5 | 21.5 |
| C | 22.0 | 26.4 |
| D | 22.0 | 19.5 |
Which reaction is exothermic?