What can be assert about permutation group theory:

a) - It is another way to describe DCJ.
b) - It differs from DCJ only in linear fissions.
c) - It is not the same of DCJ, but it is very similar to.
d) - It is not like DCJ, but is equal to SCJ method.
e) - none of the above

Original idea by: Guilherme de Mello Barsoti