[The exhilaration] was usually followed by more of the same hot walking, with the mud sucking at our boots and the sun thudding against our helmets while an invisible enemy shot at us from distant tree lines. . . . Weeks of bottled-up tensions would be released in a few minutes of . . . violence, men screaming and shouting obscenities above the explosions of grenades and the rapid, rippling bursts of automatic rifles. —A Rumor of War, Philip Caputo
What contrast does Caputo create with the imagery in this excerpt?

a slow, repetitive pattern and sudden chaos

muted, dull colors and bright, cheerful colors

sweet, tender kindness and vicious, evil cruelty

unbearable tension and soothing relaxation