What substitution reaction mechanism is most likely for the following compound?

Question

Quizplus · Accepted Answer

Both S_N1 and S_N2 are substitution mechanisms, with the former being unimolecular and the latter being bimolecular. Without knowing more specifics about the reaction conditions and reactants, it is difficult to determine which mechanism is more likely to occur. Therefore, the best choice is C, which allows for either mechanism to be possible.

What Substitution Reaction Mechanism Is Most Likely for the Following