Biology

The correct answer is: C.DNA sequences.

Explanation:

DNA sequences provide the most direct and reliable evidence for determining whether two plant species share a recent common ancestor. By comparing the genetic material (such as specific genes or entire genomes) of the two species, scientists can trace their evolutionary history and determine how closely related they are.

Here’s why the other options don’t fit as well:

A.Stem lengths: While stem lengths might vary between species, they are not a reliable indicator of shared ancestry....