There are three structural isomers that have the formula $\text{C}_5\text{H}_{12}$. Which formulae correctly show these three structural isomers?
- A$\text{CH}_3\text{CH}_2\text{CH}_2\text{CH}_2\text{CH}_3$, $\text{CH}_3\text{CH(CH}_3)\text{CH}_2\text{CH}_3$, $\text{C(CH}_3)_4$
- B$\text{CH}_3\text{CH}_2\text{CH}_2\text{CH}_2\text{CH}_3$, $\text{CH}_3\text{CH(CH}_3)\text{CH}_2\text{CH}_3$, $\text{CH}_3\text{CH}_2\text{CH(CH}_3)\text{CH}_3$