Which of the following best describes the main way that upton sinclair gathered research for the jungle?
he hired investigators to spy on activities in a meat-packing plant.
he spent two years doing research in libraries all over america.
he went undercover as a worker in a meat-packing plant.
he interviewed experts in the meat-packing industry.

the correct answer is c.

upton sinclair was an american journalist and the author of 'the jungle", a controversial book about existing working conditions in a meat-packing company in chicago. the novel was written in 1904 and its primary purpose was to advocate socialism in the usa, thus concentrating on the unfair and harsh treatment of many immigrants as a capitalist way of exploiting poor, working-class people.

as a journalist, sinclair exposed corruption in politics and business. gathering information for 'the jungle', he spent seven years working incognito in one of chicago's meat packing plants. however, contrary to many statements, he did not go undercover as a meat packer. his deception was to carry a dinner pail through the packinghouse, escorted by workers, so that he looked liked he belonged.

he would based it upon geographic luck which he often resulted his faith in.

frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. but frederick disliked rifle shooting and horseback riding. unlike his father, he was interested in french literature. he enjoyed poetry and music and, like some others of the enlightenment, he scoffed at religion. his father thought him soft, frivolous and unmindful of his duties. and when frederick refused to put his signature on a right to succession, for a few moments his father strangled him.