i know it will shift to the left, but am unsure of the reasoning (c or d)

2. Consider the system at equilibrium below. What happens when more H2 is added to the system? 2NH3(g)N2(g)+3H2(g)H=+93kJ a) The equilibrium will shift to the right. b) The equilibrium will shift to the left. c) There will be no shift in the equilibrium. 3. What is the reasoning for your choice in question 3 ? a) The probability of the number of collisions between H2 and NH3 increases, which doesn't lead to a reaction, so the equilibrium will not shift. b) The reaction is endothermic, so any disturbance that affect the product side of the equilibrium will cause the equilibrium will shift to the left. c) Adding more H2 increases the collisions, which increases the temperature, so the equilibrium will shift to the left. d) Adding more H2 increases the collisions, which decreases the activation energy of the reverse reaction so the reaction will shift to the left. e) The probability of the number of collisions between molecules that could lead to a reaction increases, so the reaction will shift to the left