Multiple Choice Question - 22/May/2015

In which of the following genomes is possible to sort using block interchanges?

a) +1 +5 +8 -2 +4 +3 -6 -7
b) -6 -1 -4 -2 -8 -3 -5 -7
c) +1 -2 -3 -4 -5 -6 -7 +8
d) +5 +4 +3 +1 -2 +6 +7 +8
e) None of the above

Original idea by: Leandro Tacioli