Caroline wonders whether her 10-month-old daughter can perceive depth well enough to avoid crawling over the edge of a tall platform in her church auditorium.Researchers could safely assess her daughter's perceptual ability using

A) a visual afterimage.
B) a Necker cube.
C) a visual cliff.
D) the Moon illusion.

The visual cliff is a safe and common method used to assess depth perception in infants. It involves a clear platform with a "cliff" drop-off, allowing researchers to observe whether the child displays a fear of falling or hesitates to crawl onto the "cliff". This is a reliable indicator of depth perception abilities in infants.