It is much easier to murder than settle differences peacefully.
There is also the issue of wanting power, if some can wipe out a group of people easily, then other races/creeds/nationalities will likely fall into line sooner than later. Hitler and Stalin did this prior, during, and post WW2.
Answer:
A. The British and French decision to give into aggression in order to keep peace
Explanation:
She developed a new strategy to pursue women's voting rights
She was Protestant, then she went back to being a Catholic.