HELP How could the notion of maximum parsimony lead to an error in establishing an evolutionary relationship?

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred

Which of the following is a responsibility of a scientist