Final answer:
The correct word to complete the sentence is 'offense.' The full sentence would be, 'though someone else might have found the awkward remark positively offensive, I took absolutely no offense at it.' The context suggests the speaker is not affected by a remark that could be considered offensive.
Step-by-step explanation:
The sentence provided by the student should be completed with the word 'offense,' which fits into the context of the sentence. Thus, the sentence should read: 'though someone else might have found the awkward remark positively offensive, I took absolutely no offense at it.' The speaker is expressing that while others might find the remark insulting or hurtful, they themselves are not bothered by it.
The snippet provided from the text indicates that the speaker feels slighted by the other's demeanor, which can be perceived as contemptuous and ungrateful, especially given the speaker's previously kind and indulgent behavior towards the individual in question.