Answer:
The event that best illustrates the monsters good side is letter B. Saving a girl who was about to drown.
Explanation:
The creature made by doctor Frankenstein in the novel of the same name by Mary Shelley is seen as a monster. He is the result of assembling parts of corpses and running electricity through them. His appearance reveals his unnatural origin, but it hides his human nature. He is capable of thinking and feeling, but people cannot see beyond their prejudices toward him.
At a point in the book, the creature is hiding in the woods when a little girl who's playing and running around falls into the river. He doesn't think twice, his kindness and empathy make him choose to save her despite the danger it represents to his own life. Unfortunately, his good deed is not well rewarded. After rescuing her, he is shot and, very humanly, feels wronged:
"This was then the reward of my benevolence! I had saved a human being from destruction, and as a recompense I now writhed under the miserable pain of a wound which shattered the flesh and bone. The feelings of kindness and gentleness which I had entertained but a few moments before gave place to hellish rage and gnashing of teeth. Inflamed by pain, I vowed eternal hatred and vengeance to all mankind. But the agony of my wound overcame me; my pulses paused, and I fainted."
