When i refer to integrity, i have something very specific in mind. integrity, as i will use the term, requires three steps: discerning what is right and what is wrong; acting on what you have discerned, even at personal cost; and saying openly that you are acting on your understanding of right and wrong. the first criterion captures the idea that integrity requires a degree of moral reflectiveness. the second brings in the ideal of a person of integrity as steadfast, a quality that includes keeping one's commitments. the third reminds us that a person of integrity can be trusted.
source: carter, stephen l. “the insufficiency of honesty.” atlantic monthly feb. 1996: 74+. print.

based on the passage above, which of the following reflects the correct use of brackets?
a) carter comments that “[a] person of integrity can be trusted[.]”
b) carter believes that “[i]ntegrity . . [r]equires [t]hree [s]teps.”
c) [carter] writes, “[i]integrity requires a degree of moral reflectiveness.”
d) carter explains, “[integrity is] a quality that includes keeping one’s commitments.”