The closer the node of divergence on a cladogram, the more recently the two species have a common ancestor, and typically, the more genetic and molecular similarities they share. Thus, based on the cladogram, humans are more closely related to kangaroos than to frogs.
A. Based on the cladogram provided, the "human-kangaroo" relationship (H-K) would be closer than the "human-frog" (H-F) relationship. This is because, according to the branching points (nodes) on the cladogram, humans and kangaroos share a more recent common ancestor than humans and frogs do.
B. Yes, the cladogram agrees with this statement.
C. The reasoning is that in a cladogram, the proximity of branching points to the present day (usually represented at the right or top of the diagram) indicates more recent common ancestry. The human branch and the kangaroo branch join at a node that is closer to the present than the node where humans and frogs diverge.