Step 1: Concept
The Wurtz reaction involves the coupling of alkyl halides using metallic sodium.
Step 2: Meaning
Sodium is highly reactive with water and alcohols, producing hydrogen gas.
Step 3: Analysis
To prevent unwanted side reactions with the sodium metal, an inert, non-polar solvent must be used.
Step 4: Conclusion
Dry ether is used as it is non-reactive toward sodium and facilitates the reaction.
Final Answer: (D)