The Peter Auger cosmic ray observatory is operated by DOE scientists from Fermilab. Which of the following statements is TRUE of how cosmic rays are detected by this observatory?

W) The observatory detects cosmic rays by measuring the local electric field

X) The observatory directly observes cosmic rays interacting with water

Y) The observatory detects the shower of energetic particles produced by a cosmic ray

Z) The observatory uses interferometry to detect cosmic rays
Y) THE OBSERVATORY DETECTS THE SHOWER OF ENERGETIC PARTICLES PRODUCED BY A COSMIC RAY