Answer:
A. All of these
Step-by-step explanation:
The Ring of Fire makes up over 450 volcanoes.
-Skiing the Pacific Ring of Fire and Beyond: Hekla is the most active and most famous volcano in Iceland.
-Popocatépetl is one of the most dangerous volcanoes in the Ring of Fire.
-At least 450 active and dormant volcanoes lie the Ring of Fire, with the supervolcano in Yellowstone being the most dangerous if it were to erupt.