Which social problem did upton sinclair's novel the jungle describe? a. the struggles of black americans b. the living and working conditions in chicago's stockyards c. the ruthless business methods of john d. rockfeller and standard oil d. the conflict between california farmers and the southern pacific railroad.

The correct answer is Option B.

The social problem discussed in the novel "The Jungle" by Upton Sinclair is the despair of the immigrants who are working in Chicago stockyards and reveals the industry's awful working and living conditions, primarily pointing out the unsanitary conditions.

on this day in 1913, henry ford installs the first moving assembly line for the mass production of an entire automobile. his innovation reduced the time it took to build a car from more than 12 hours to two hours and 30 minutes.

in his book, the riddle of the rosetta stone, james giblin talks about how there was a young british polymath and physician named thomas young who made a lot of advances on the deciphering of the rosetta stone. he says that even though young made a lot of mistakes because he was working under false assumptions, he also made huge contributions like deciphering three out of the seven symbols (more than anyone else before him). young published his findings and continued his good work but he wasn't able to progress much further due to some unfavorable situations, he still laid the basis for many other scholars and of course for the man who has been generally known to have deciphered it, jean-françois champollion