There was never the least attention paid to what was cut up for sausage. [O]ld sausage that had been rejected and that was mouldy and whiteit would...

There was never the least attention paid to what was cut up for sausage.... [O]ld sausage that had been rejected and that was mouldy and white—it would be dosed with borax and glycerin...meat stored in great piles...and the water from leaky roofs would drip over it, and thousands of rats would race about on it.... The rats were nuisances, and the packers would put poisoned bread out for them, they would die, and then rats, bread, and meat would go into the hoppers together. - Upton Sinclair, The JungleThis passage from Upton Sinclair's The Jungle advocates

a. workers' rights

b. consumer protection

c. industry self-regulation

d. protective legislation