In an argument with two or more independent reasons, if one of those reasons turns out to be false, how does a critical thinker apply the test of logical strength to the argument

Ineed because i cannot find the answers anywhere

Chris, a master at office gossip and innuendo, says, "we know we have a corporate spy someplace in the organization, probably on the management team itself. there is no evidence that it is audrey. in fact, she's too clean, if you know what i mean. somebody should fire audrey; she's got to be the spy." by making this argument chris is actually engaging in (a) an appeal to emotion fallacy (b) a straw man fallacy (c) an appeal to ignorance fallacy (d) circular reasoning (e) an appeal to the mob fallacy

During the period from 1865 to 1898 how did the political/economic elite contain the demands of farmers and laborers for economic justice