What Does the Positioning of the Toe Indicated by the Arrow

What does the positioning of the toe indicated by the arrow in this figure suggest about the owner of this fossil hominid foot?

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