why did cartoonist Thomas Nast portray Boss William Tweed as a vulture feeding on the city of New York?

a. Because Tweed had controlled labor in the city.
b. Because Tweed had cheated the city out of huge amounts of money.
c. Because Tweed managed to avoid jail despite his crimes.
d. Because Tweed gave loans to the immigrants of the city, but not others.

b. Because Tweed had cheated the city out of huge amounts of money.