Answer:
the cotton gin
Explanation:
While the cotton gin reduced the amount of labor required to remove the seeds from the plant, it did not reduce the number of slaves needed to grow and pick the cotton.
The first and most obvious answer to the question of why we're so obsessed with burgers is: burgers are cheap. ... It's not just that burgers are cheap, it's that they're easy to eat. Because the meat is ground up, you don't have to do much chewing. Because it's served on a bun, it's easy to eat.
The answer is B. Hope it helps!