Roger is given a test called a false$-$belief task. In this test, Sally puts a ball in a basket and leaves, and then Anne moves the ball to a box. Roger is asked where Sally will look for her ball when she comes back. If Roger answers, in the basket, it means that

Roger failed the test.

Roger must be younger than $3$ years old.

Roger is not yet skilled at managing his attention.

He understands that Sally does not know the ball was moved.