The correct option is A Features and shared characters depicting evolution in form of a diagram.
A cladogram is a diagram used in cladistics which shows relations among organisms. A cladogram is however not an evolutionary tree because it does not show how ancestors are related to descendants or how much they have changed, many evolutionary trees can be inferred from a single cladogram. A cladogram uses lines that branch off in different directions ending at groups of organisms. So, cladogram represents features and shared characters depicting evolution in form of a diagram. Thus, option A is correct.
Cladistics is a powerful new method for determinining the evolutionary histories of organisms and expressing those relationships in tree like manner. An evolutionary tree constructed using cladistic method is cladogram.