"And Now,after the Father Has Been Killed,the Mission Burned,its Many

"And now,after the Father has been killed,the Mission burned,its many and valuable furnishings destroyed,together with the sacred vessels,its paintings,its baptismal,marriage,and funeral records,and all the furnishings for the sacristy,the house,and the farm implements-now the forces [of soldiers] of both presidios [nearby] come together to set things right....What happened was that before they set about reestablishing the Mission,they wanted to ...lay hands on the guilty ones who were responsible for the burning of the Mission,and the death of the Fathers,and chastise them.The harassed Indians rebelled anew and became more enraged....And so the soldiers there are gathered together in their presidios,and the Indians in their state of heathenism.... But ...what can be gained by campaigns [against the rebellious Indians]? Some will say to frighten them and prevent them from killing others.What I say is that,in order to prevent them from killing others,keep better guard over them than they did over the one who has been killed;and,as to the murderer,let him live,in order that he should be saved-which is the very purpose of our coming here,and the reason which justifies it."
What main argument did Father Junípero Serra give for sparing the Indians who destroyed the Spanish Mission San Diego de Alcalá?

A) If they are allowed to live,they can become Christians.
B) If they are killed,other Indians will become angry and commit more violence.
C) If they are allowed to live,they can be forced into military service.
D) They will suffer more if they are allowed to live in poor conditions than if they are killed.