Which of the following compounds is an additive to natural gas that serves as an odorant?

W) Hydrogen sulfide

X) tert-Butylthiol [turt-byoo-til-THY-ol]

Y) Acetylsalicylate [uh-seet-l-suh-LIS-uh-layt]

Z) Methylamine [meth-uh-a-MEEN]
X) TERT-BUTYLTHiol