Abraham Lincon's initial proposals for Reconstruction were basically

a) Strict

b) mild

c) inflexible

d) partisan

Lets use the process of elimination in your question

It can't be A because Lincoln wanted to end the war and have the Southern states join the union as quickly as possible and free all the slaves

It is most likely B because he doesn't really do much to punish he wants to end the war

C and D could easily be eliminated