Final answer:
Because Jeffrey was an arrogant person, he could not extol anyone else without first admiring himself. Option 13 is correct.
Step-by-step explanation:
The sentence reads: 'Because Jeffrey was an arrogant person, he could not extol anyone else without first admiring himself.'
The context implies that Jeffrey's arrogance prevents him from doing something positive toward others, as his self-admiration comes first.
The most suitable word from the list provided is 'extol', which means to praise enthusiastically.
Therefore, the completed sentence should read: 'Because Jeffrey was an arrogant person, he could not extol anyone else without first admiring himself.'Option 13 is correct.