What Is the Fundamental Idea Behind Parsimony

What is the fundamental idea behind parsimony?

A) the best phylogeny is the one that both explains the observed character data and posits the fewest evolutionary changes for a group of taxa
B) the best phylogeny is the one that posits the greatest number of evolutionary changes for a group of taxa
C) the computed number of morphological or molecular distances between taxa indicates their relatedness
D) morphological traits cannot be used to reconstruct phylogenetic history

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