Final answer:
The antonym for 'creditable record' is 'Disgraceful', as it closely represents the opposite in terms of honor and respectability, while the other options do not effectively convey an opposing meaning.
The correct answer is option C. Disgraceful.
Step-by-step explanation:
The antonym for 'creditable' record is 'Disgraceful' (Option C). In this context, 'creditable' refers to something that is praiseworthy or deserving of recognition. The word 'disgraceful', on the other hand, describes something that is shameful or dishonorable, making it the opposite in meaning to 'creditable'. Options A (Unbelievable), B (Falsified), D (Reliable), and E (Consistent) do not accurately represent the opposite of 'creditable'. 'Unbelievable' may imply a sense of surprise rather than a lack of respect or honor. 'Falsified' indicates that something has been tampered with or is fraudulent. 'Reliable' suggests dependability, which could be a characteristic of a 'creditable' record, thus not its antonym. Lastly, 'Consistent' means maintaining the same standard over time, which is not necessarily the converse of 'creditable'.