Final answer:
The words that best complete the sentence are 'apprehension', 'escalated', and 'confiscatory', showing concern about increasing tax rates resulting in individuals retaining little of their income.
Step-by-step explanation:
The appropriate words to fill in the blanks in the sentence given by the student are: (i) apprehension (ii) escalated (iii) confiscatory. Thus, the complete sentence is: 'The citizens met with their senator to express apprehension, arguing that if tax rates escalated any further, taxes would become confiscatory, allowing hard-working individuals to keep little of their well-earned income.' These words best fit the context of the sentence, which is about citizens expressing concerns about potentially excessive taxation. 'Apprehension' means anxiety or fear that something bad will happen, 'escalated' refers to something increasing or intensifying, and 'confiscatory' describes something that takes away from someone.
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