The Positioning of the Toe Indicated by the Arrow in the Figure

The positioning of the toe indicated by the arrow in the figure below suggests that the animal with this fossil hominid foot

A) most likely always traveled on four feet.
B) most likely spent all of its time swinging in the trees.
C) traveled mostly on four feet but also spent a great deal of time swinging in the trees.
D) probably walked upright on two feet and may have spent time in trees.