Seven-Month-Old Mazie Is Crawling Toward the End of the Bed

Seven-month-old Mazie is crawling toward the end of the bed. How likely is it that she will continue on and fall off?

A) Unlikely, because depth perception develops by about six months of age
B) Unlikely, because her mother will probably stop her before she reaches the end
C) Likely, because infants only use monocular cues when judging depth
D) Likely, because depth perception develops later in childhood