Which of the following nucleophilie has highest `S_(N)^(2)` reactivity?

Options

A. MeO^(-)
B. `Me-CH_(2)-O^(-)`
C. `Me_(2)-CHO^(-)`
D. `Me_(3)CO^(-)`

Explanation

To determine which nucleophile has the highest \( S_N2 \) reactivity, we need to analyze the given options based on their structure and steric hindrance.

### Step-by-Step Solution:

1. **Identify the Nucleophiles**:
The options provided are:
- Option 1: \( CH_3O^- \)
- Option 2: \( CH_3CS_2^- \)
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