What sparked a riot in New York City in 1863?
food shortages and a rise in starvation
a draft that was unfair to the lower classes
a drop in employment in weapons factories
the suspension of the writ of habeas corpus
It was "a draft that was unfair to the lower classes" that sparked a riot in New York City in 1863, since many people felt it was unfair that the wealthy could avoid such a draft by paying money.