Which of the Following Is Not True of the Recording

Which of the following is not true of the recording of eye movements using an eye tracker?

A) It measures the direction of the baby's gaze in relation to the scene that lies before the baby
B) Calibrating a baby's eye movements is easy
C) It tells us fairly precisely which object the baby looked at
D) Some eye trackers can provide information about pupil dilation
E) The eye tracker will generate a recording of the scene that the baby observed