Final answer:
The aim of scientists applying the concept of maximum parsimony when creating phylogenetic trees is to choose the tree that represents the fewest evolutionary changes.
Step-by-step explanation:
The aim of scientists applying the concept of maximum parsimony when creating phylogenetic trees is to choose the tree that represents the fewest evolutionary changes, either in DNA sequences or morphology (option d). Maximum parsimony hypothesizes that events occurred in the simplest, most obvious way, and the pathway of evolution probably includes the fewest major events that coincide with the evidence at hand. It seeks to find the tree with the fewest number of character reversals, the fewest number of independent character changes, and the fewest number of character changes throughout the tree.