The example from the story that could NOT easily be performed by a small number of actors on stage is:
D. The end scene of the story when the blue jays come as a group filling the sky with blue.
This scene involves a large group of blue jays, which would require multiple actors or visual effects to convincingly represent a flock of birds filling the sky. It is more challenging to depict this on stage with a small number of actors compared to the other options that involve more manageable interactions.