Star Trek: The Common Irishman Mystery Cache

Caching: The finder's frontier.  These are the voyages of the caching explorers.  Their life-long mission: to explore strange new towns, to seek out new caches and new hiding spots, to boldly go where no muggle has gone before.

This Star Trek Geoart is a tribute for Trekkies and non Trekkies all around. Answer the questions to find the final coordinates for each cache in the series. Cache is not at the posted coordinates. Enjoy!

The Common Irishman

Miles Edward O'Brien, played by Colm Meaney, is a character in Star Trek: The Next Generation and Star Trek: Deep Space Nine. O'Brien was originally a recurring character as the transporter chief of the USS Enterprise-D. He was later promoted to a main character as the chief of operations of Deep Space Nine. O'Brien is the only major Star Trek character described as both ethnically Irish and born on Earth in Ireland. O'Brien's character is unique in the Star Trek universe. As well as being a non-commissioned officer, he is also a family man with a wife and children. He is often portrayed as being less patrician, and more pragmatic and down-to-earth than his colleagues. The producers would routinely put O'Brien under intense psychological pressure in episodes jokingly dubbed 'O'Brien must suffer'. O'Brien was regularly chosen for such storylines because it was felt people could empathise with him  Fans of the show thought of him a common man they could relate to.

QUESTION FOR FINAL COORDINATES: What classic Irish tune was played in a couple episodes that featured O'Briens character? 

A. The Wearing of the Green - N39 23.145 W087 26.789

B. Dunlavin Green - N39 23.721 W087 26.358

C. The Minstrel Boy - N39 23.428 W087 26.310

D. Irish Soldier Laddy - N39 23.374 W087 26.258