Which quotation from a translation of The Underdogs most effectively … | Verbal SAT Question

The Underdogs is a 1915 novel by Mariano Azuela, originally written in Spanish. In the novel, a group of soldiers travel through a canyon, where their collective mood becomes strongly affected by the strenuous conditions of their journey:

Which quotation from a translation of The Underdogs most effectively illustrates the claim?

“The sierra is clad in gala colors. Over its inaccessible peaks the opalescent fog settles like a snowy veil on the forehead of a bride.”

“All day long [the soldiers] rode through the canyon, up and down the steep, round hills, dirty and bald as a man’s head, hill after hill in endless succession.”

“Then, hurriedly, [the soldiers] took the Juchipila canyon northward, without halting to rest until nightfall.”

“The sun, beating down upon [the soldiers], dulled their minds and bodies and presently they were silent.”