According to the passage, the information provided to the bat by CF echoes differs from that provided by FM echoes in which of the following ways? A. Only CF echoes alert the bat to moving targets. B. Only CF echoes identify the range of widely spaced targets. C. Only CF echoes report the target's presence to the bat. D. In some species, CF echoes enable the bat to judge whether it is closing in on its target. E. In some species, CF echoes enable the bat to discriminate the size of its target and the direction in which the target is moving.