Nucleophilic substitution reactions are vital processes in organic chemistry where an atom or a group of atoms is replaced by a nucleophile. Consider the reaction of 1-bromo-2-methylpropane with sodium hydroxide (NaOH) in a polar aprotic solvent. This reaction is notable for its ability to follow two pathways: bimolecular nucleophilic substitution (S_N2) and unimolecular nucleophilic substitution (S_N1). In the S_N2 mechanism, the nucleophile attacks the electrophile from the opposite side of the leaving group resulting in an inversion of configuration at the carbon center. In contrast, S_N1 involves the formation of a carbocation intermediate, leading to different stereochemical outcomes. Based on this information, which of the following statements is true regarding the expected product of the reaction?