Structural isomerism and stereoisomerism need to be taken into account when answering this question. Compound J is treated with KOH dissolved in ethanol. Three isomeric alkenes with molecular formula C$_4$H$_8$ are produced. What is J?
- ACH$_3$CH$_2$CH$_2$CH$_2$Br
- BCH$_3$CH(Br)CH$_2$CH$_3$
- CCH$_3$CH(CH$_3$)CH$_2$Br
- D(CH$_3$)$_3$CBr