The synonym for the word "gratuitously" as it is used in this excerpt from "Let Sleeping Dogs Lie." is C. thankfully.
It should be noted that a synonym simony means the word or the phrase that can be used to replace another word in a sentence.
In this case, the synonym for the word "gratuitously" as it is used in this excerpt from "Let Sleeping Dogs Lie." is thankfully.
This can be depicted based on the information given.
Therefore, the correct option is C.
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