Which of the Following Factors Likely Did NOT Contribute to the Evolution

Which of the following factors likely did NOT contribute to the evolution of distinctive human characteristics relative to great apes?

A) alteration of developmental timing so that certain juvenile characteristics are retained in the sexually mature adult
B) the evolution of bipedalism followed by evolutionary modifications to the skull, pelvic structure, foot, and legs
C) the evolution of bipedalism followed by increasingly sophisticated tool use, cognitive ability, and social organization
D) the evolution of the FOXP2 gene associated with more sophisticated language
E) the evolutionary loss of a tail, allowing the adoption of a fully upright and bipedal stance