When 0.262 mol of a weak base is reacted with excess HCl, 6.91 kJ of energy is released as heat. What is delta H for this reaction per mole of A- consumed

Conservation efforts have been effective in "increasing the number of endangered species, reducing all the negative impacts of human activity, and preserving wildlife habitats".hope my answer has you : ) 

Iam pretty sure that the answer is d

Answerlimiting reactant;