Read this excerpt from Al Gore's Nobel Prize acceptance speech: PLEASE HELP ME

However, despite a growing number of honorable exceptions, too many of the world's leaders are still best described in the words Winston Churchill applied to those who ignored Adolf Hitler's threat, and I quote: "They go on in strange paradox, decided only to be undecided, resolved to be irresolute, adamant for drift, solid for fluidity, all-powerful to be impotent."
Which statement best describes how word choice helps establish style in the excerpt?
A. The use of words such as "best" and "powerful" helps establish a peaceful style.
B. The use of words such as "paradox" and "irresolute" helps establish a formal style.
C. The use of words such as "I" and "they" helps establish a welcoming style.
D. The use of words such as "however" and "strange" helps establish a casual style.