If only structural isomers are included, how many alcohols of each kind have the formula $\text{C}_5\text{H}_{12}\text{O}$?
- Aprimary 3; secondary 3; tertiary 2
- Bprimary 4; secondary 2; tertiary 2
- Cprimary 4; secondary 3; tertiary 1
- Dprimary 5; secondary 2; tertiary 1