When Humans and Pigeons Searched for Hidden Targets in a Square

Multiple Choice

When humans and pigeons searched for hidden targets in a square of changing size,

A) both human and pigeons used distance from a particular landmark to find the target .
B) only humans used distance from a particular landmark to find the target.
C) both humans and pigeons used the geometric configuration of the square to navigate.
D) only humans used the geometric configuration of the square to navigate.
E) only pigeons used the geometric configuration of the square to navigate.