Final answer:
The best fit synonym for the word 'novel' in the given sentence is 'unusual'.
Step-by-step explanation:
The best fit synonym for the word 'novel' in the given sentence is unusual. The word 'novel' refers to something that is new or different, and in this context, it suggests that Sam's idea is unique or uncommon. The other options, 'ripe' and 'new', do not convey the same meaning as 'unusual' in relation to the sentence.
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