He could not be allowed out of the attic at all
C is not the right answer as it does not even include name of the artist, Di Vinci. The correct answer is A. Leonardo Di Vinci is best known for his fantastic paintings and sculptures but he was also an inventor and invented the ariel screw, the parachute, and several war machines.
He sells Jim back into slavery.
The same thing that happened in the 19th century, "The Great Stink". The name is real and it describes an event from the past which would repeat if they started throwing waste again. The river would become so polluted that disease and contagion would begin to spread. In the 19th century, it was cholera. Now, nobody knows.