An iron nail is completely coated with zinc so that it does not rust. Which row names this protection method and explains why zinc is chosen to protect the iron nail?
- Abarrier method and sacrificial protection; zinc is more reactive than iron
- Bbarrier method and sacrificial protection; iron is more reactive than zinc
- Csacrificial protection only; zinc is more reactive than iron
- Dbarrier method only; iron is more reactive than zinc