One UPS to rule them all

One of your eight-outlet under-desk UPS units has stopped working, and you’d like to find the best way to decommission the unit. Which of these would be the best way to dispose of this broken UPS?

A) Refer to the MSDS for the proper procedures

B) Send the old unit back to the manufacturer

C) Dispose of the unit in the usual garbage bin

D) Contact your local electronics store for disposal instructions

E) Build a lead-lined concrete container and throw the entire thing into the fires of Mount Doom