Milton is using the nature of darkness to indicate evil, the opposite of God (or "light").
For this reason the fire of Hell has no light. (God and heaven, however, are always described in terms of light.)
As a result, Milton's vision of hell is so dark that it is "darkness visible" -- meaning it is visible evil. In forsaking God, Satan and his companions have forsaken all light as well.
The right answer for the question that is being asked and shown above is that: "A. He is afraid he will lose to Uncle." Wilbur begin to cry when he hears about Uncle because <span>He is afraid he will lose to Uncle. </span>
