Please answer the following question: You are presented with the question "What may be stored in sedimentary rock for millions of years." and the following answer choices: - Sand castles - Chemical energy - heat energy - Millions of dollars. - A fuel source. - Energy. - In sediment - Stored animal fur. Now knowing that carbon may be stored in sedimentary rock for millions of years and carbon is the fuel source, choose the best answer.
A:
A fuel source.