Context: This is a piece of pumice. Do you see the hollow gaps in this piece of rock? The gaps come from air and water bubbles that became trapped while the rock was forming.
Pumice is usually formed near volcanoes. Sometimes, the lava in a volcano can cool very quickly. Pumice forms when the lava traps air and water bubbles as it cools.
What type of rock is pumice?
A. metamorphic
B. sedimentary
C. igneous
Answer with the option's letter from the given choices directly.

C