Which of the following best describes how comparative anatomy can be used to determine the evolutionary relationship between two organisms?

organisms that have a great deal of physical similarity are more likely to share a common ancestor than two organisms with few physical traits in common.
comparing the physical traits of two organisms makes it possible to determine how long ago they shared a common ancestor.
studying the physical differences between two organisms will show which organism evolved from the other.
two species that have few physical traits in common do not share a common ancestor and most likely evolved from different species.