Classify the underlined conjunction in each of the following sentences as coordinating, correlative, or subordinating.

1. does the idea of discovering a chest of pirate gold or digging up valuable artifacts excite you?

coordinating
correlative
subordinating

2. some individuals spend years following carefully researched leads, while others accidentally stumble across treasure-troves.

coordinating
correlative
subordinating

3. to hunt for treasure beneath the sea, many salvage operations use not only historical archives but also sophisticated electronic equipment.

coordinating
correlative
subordinating

4. the treasure-laden ship nuestra señora de la concepción sank in the sixteenth century as it was supposedly carrying twenty-five tons of gold and silver.

coordinating
correlative
subordinating

5. the ship with its precious cargo never returned to spain and is believed to have sunk in the bahamas.

coordinating
correlative
subordinating