An alkene P reacts with an excess of hot concentrated acidified $\text{KMnO}_4\text{(aq)}$. Methylpropanoic acid is the only organic product formed. Which alkene is P?
- A2,5-dimethylhex-3-ene
- B2-methylbut-2-ene
- Cmethylpropene
- Doct-4-ene, $\text{C}_8\text{H}_{16}$