Paleontologists Have Inferred Bipedalism in Hominins from Which of the Following

Paleontologists have inferred bipedalism in hominins from which of the following structures in humans as compared to chimpanzees?

A) Humans have both ends of the femur larger than chimps, and a smaller angle at the hip end of the femur than chimps.
B) Humans have both ends of the femur smaller than chimps, and a smaller angle at the hip end of the femur than chimps.
C) Humans have both ends of the femur larger than chimps, and a larger angle at the hip end of the femur than chimps.
D) Humans have both ends of the femur the same chimps, but a smaller angle at the hip end of the femur than chimps.