Given the equation representing a chemical reaction at equilibrium in a sealed rigid container:

H2(g)+I2(g)+energy=2HI(g)

When the concentration of I2(g) is increased by adding more iodine gas to the container at constant temperature, the equilibrium shifts

A)
to the right, and the concentration of HI(g) decreases
B)
to the right, and the concentration of HI(g) increases
C)
to the left, and the concentration of HI(g) decreases
D)
to the left, and the concentration of HI(g) increases