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Wires are joined together with solder to ensure what?

  1. Durability

  2. High conductivity

  3. Maximum voltage

  4. Minimum resistance

The correct answer is: Durability

Solder is used to join wires together to create a more durable connection. While solder does increase conductivity and reduce resistance to some extent, its primary purpose is to provide a strong and lasting bond between wires. Therefore, options B, C, and D are incorrect.