You could conclude that the child in this figure is able to adopt the perspective of his conversational partner if he
a. immediately looks at the taller glass when the speaker says "Pick up the glass."
b. looks at both glasses when the speaker says "Pick up the glass," and then asks "Which one?"
c. says "Pick up the tall glass" if he wants the glass on the right.
d. points if he wants either of the glasses.
