30 POINTS! PLEASE ANSWER ASAP!
The following image shows where numerous similar bird species are found
throughout the world. After knowing this distribution of current day species, what
do scientists look for as evidence for the existence of common ancestors?

A.)Scientists look for fossils that could be common ancestors on the different
continents, showing that the common ancestor once existed on one or more
continents before the continents split apart.

B.)Scientists look for transitional fossil species to show that the ostrich evolved
from the rhea.

C.)Scientists look for similar bone structures in the animals to account for a
common ancestor.