Fact 1: Carbon may be stored in sedimentary rock for millions of years.

Fact 2: Limestone is a type of sedimentary rock.

Given the two facts above, answer the question "What might be stored in limestone?" with the following options: 
- carbonated water
 - chemicals
 - cigars
 - candles
 - Energy.
 - carbon
 - Energy
 - fossils


 

      carbon   