Context: This passage describes a chemical reaction. Read the passage. Then, follow the instructions below.
Have you ever eaten food that was cooked on a grill? Some grills are powered by propane gas. The propane combines with oxygen in the air to make carbon dioxide gas and water vapor. This process releases energy in the form of heat, creating a flame that cooks the food.
Complete the sentence.
In this chemical reaction, propane is a ().
A. reactant
B. product
Identify the correct option from the choices provided and respond with the letter of the correct option.

A