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.