Examine the classification chart for animal groups shown here. Which statement BEST describes how the groups of organisms are categorized above?
A) Fish and amphibians share more traits than reptiles and birds.
B) Mammals and fish share fewer traits than crustaceans and insects.
C) Birds and mammals are more closely related than any other group shown on the chart.
D) Insects and arachnids share more characteristics in common than crustaceans and mollusks.