A person’s failure to keep a promise is wrong -----> if, doing so harms the one to whom the promise is made ------> and rest who lose confidence in the person’s ability to keep promises.
Hence we can conclude intentionally broken promises are wrong
(A) Ann kept her promise to repay Felicia the money she owned her. Further, this convinced everyone who knew Ann that she is trustworthy. Thus, Ann’s keeping her promise was not wrong. ( Not justifying the crux of the passage as nothing mentioned regarding the creditor needed her money) ((crossed out))
(B) Jonathan took an oath of secrecy concerning the corporation’s technical secrets, but he sold them to a competitor. His action was wrong even though the corporation intended that he leak these secretes to its competitors. ( It's not justifying the crux of passage either as the company was itself going to sold the secret. It would have harmed the company no matter what, no trust relationship is established here) ((crossed out))
(C) George promised to repay Reiko the money he owed her. However, George was unable to keep his promise to Reiko and as a result, Reiko suffered a serious financial loss. Thus, George’s failure to keep his promise was wrong. ( Promise was not broken intentionally here, then we can conclude he didn't make his creditors loss intentionally, so it's not wrong) ((crossed out))
(D) Because he lost his job, Carlo was unable to repay the money he promised to Miriam. However, Miriam did not need this money nor did she lose confidence in Carlo’s ability to keep promises. So, Carlo’s failure to keep his promise to Miriam was not wrong.(broken promise got its justification, however breaking promise was not the intention but circumstances forced him so it won't be wrong) ((correct))
(E) Elizabeth promised to return the book she borrowed from Steven within a week. But she was unable to do so because she became acutely ill. Not knowing this, Steven lost confidence in her ability to keep a promise. So, Elizabeth’s failure to return the book to Steven was wrong. (Book returning promise won't make a dent in the actual life of book creditor, broken promise must held any specific loss to be put forward as wrong)((crossed out))
Hence IOC is D
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