Look at the diagram shown below:

A slanting, horizontal line is shown. On the extreme left, there is a label that says Common Ancestor. Along the slanting, horizontal line there are five dots labeled from left to right with the following traits Four limbs, Amniotic egg, Fur, Shearing teeth, and Retractable claws. There is one vertical line between each of the consecutive five dots. The lines are labeled Amphibians, Reptiles, Marsupials, Dogs, Cats.

Based on the diagram, which of the following traits come before shearing teeth?

Group of answer choices