Regarding to genome rearrangement, which alternative is correct:

a) - SCJ only can solve several rearrangement genome problems in exponential time
b) - One genome needs to have at least two adjacencies to be used at SCJ method
c) - Fitch's algorithm consider adjacencies as binary character
d) - Adjacencies are always seen as binary characters under SCJ method 
e) - none of the above

Original idea by: Guilherme de Mello Barsoti