Bactrian camels, dromedaries, llamas, and alpacas are all members of the same taxonomic family, Camelidae. Members of this family all have two toes, no hooves, true canine teeth, and a split upper lip. The family Camelidae originated in North America. The physical features of animals in this family and the family's geographical origin provide evidence that all these animals -- A live in the same type of ecosystem B have slowly evolved to become herbivores
C have a common ancestor
D exchanged DNA at some point in the past