According to cladistics, the best classification system is one that A. groups organisms based on similarities in morphology. B. conforms to traditional, Linnaean taxonomic practices. C. accurately reflects evolutionary history. D. shows a single evolutionary divergence of all prokaryotes from a eukaryotic ancestor. E. ignores secondary loss of characteristics inherited from a common ancestor.

C. Accurately reflects evolutionary history.

Explanation:

Cladistics is a taxonomic system that seeks to group organisms according to their shared phylogeny or ancestry. An ancestor is identified and its descendants are traced in this classification system.

Certain characteristics of the ancestor such as his physical structure or form or his genetic traits are compared among descendants. The main method of classification is monophyletic, which is a system where the descendants are traced to only one ancestor.

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.