Answer
C. A
Step-by-step explanation:
One of the factors that affect chemical equilibrium is temperature. Temperature is a measure of heat.
Changes in temperature for an exothermic reaction, affect the equilibrium position as follows; increasing the temperature (heated up) will shift the equilibrium to the left (reactant), while decreasing the temperature will shift the equilibrium to the right (product).
Therefore, the correct option to the question is C. A