Which of the substitution reactions below occurs at a faster rate? Why?

• A. Reaction (i) occurs at a faster rate because it involves a less sterically hindered nucleophile.
• B. Reaction (ii) occurs at a faster rate because it involves a more stable intermediate.
• C. Reactions (i) and (ii) occur at the same rate because they both involve a 3° alkyl halide.

Answer: (C)