Based on this graph, how has automobile usage changed?

It has decreased by about 20% among young people.
It has increased by about 20% among young people.
It has decreased by about 40% among young people.
It has increased by about 40% among young people.

it has decreased about 20%

Explanation:

it is obviously  over -20% but is still closer to -20%  than -40%

haitian revolution slaves initiated the rebellion in 1791 and by 1803 they had succeeded in ending not just slavery but french control over the colony

c) troops march forward in close formation against newer, more accurate weapons