Select the correct text in the excerpt.
Which sentence in this passage is a clear example of irrelevant and insubstantial support for an argument?
(5) Riggs disagreed with Sheldon and Browne. In his reply to Browne, Riggs declared:
(6) "I don't like the name of Denali. It is not descriptive. Everybody in the United States knows of Mt.
McKinley and the various efforts made to climb it. In consequence, both Mr. Yard and I think that the name
McKinley should stick.... "
(7) "Mount McKinley National Park" officially prevailed after its legislation was signed into law on February
26, 1917.
(8) It proved difficult to supplant words and meanings that endured for generations among Athabaskan
groups living in close proximity to the mountain.