Explain why, regardless of the base utilized, the following alkyl halide does not undergo a substitution reaction.

• A. It does not undergo the S_N1 reaction because of steric hindrance preventing it from being attacked by a nucleophile. It does not undergo the S_N2 reaction because the multi-ring structure prevents the sp² carbon in the carbocation formed from having a 120° bond angle making the carbocation unstable.
• B. It does not undergo the S_N2 reaction because of steric hindrance preventing it from being attacked by a nucleophile. It does not undergo the S_N1 reaction because the multi-ring structure prevents the sp² carbon in the carbocation formed from having a 120° bond angle making the carbocation unstable.
• C. It does not undergo the S_N1 reaction because of steric hindrance preventing it from being attacked by the leaving group. It does not undergo the S_N2 reaction because the multi-ring structure permits the sp² carbon in the carbocation formed having a 120° bond angle making the carbocation unstable.
• D. It does not undergo the S_N2 reaction because of steric hindrance preventing it from being attacked by an electrophile. It does not undergo the S_N1 reaction because the multi-ring structure prevents the sp² carbon in the carbocation formed from having a 180° bond angle making the carbocation stable.

Answer: (B)