I believe that D. Are you finished planning your experiment?" he asked and C ."Ouch! I bit my tongue!" the child wailed are correct . They don't have any punctuation errors.
The answer is that it makes the audience more receptive of
the character’s views. His soliloquy is
gives the audience an idea about who he is and why he does these things. Although it doesn’t justify his actions, it
makes the audience understand him.