Organism A shares 50% of its DNA sequences with organism B, while organisms B and C share 90% of their DNA sequences. What can be concluded from this?
a. Organism A has suffered more mutations than organisms B or C.
b. Organism A is more ancient than either organism B or organism C.
c. Organisms B and C are more closely related to each other than they are to organism A.
d. Organisms B and C are probably full siblings while organism A is a grandparent of both.