please help! Phylogenic trees represent hypotheses of relatedness based on evidence. What is a common mistake taxonomists can make when attempting to place seemingly closely-related species into a phylogenic tree?

The two species share many structural proteins, genes, and metabolic pathways.
The two species share an evolutionary history based upon matching DNA.
The two species seem to be located in the same region on the planet.
The two species share similar morphology or character traits.