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Question:

Which of the following words is spelled correctly?

A sanction
Explaination


Sanction is correct because the suffix should be, and is, -tion.
Caushun is incorrect because the suffix should be -tion, not -shun. (i.e. caution).
Fractshun is incorrect because the suffix should be -ion, not -shun. (i.e. fraction)
Subtractsion is incorrect because the suffix should be -ion, not -sion. (i.e. subtraction)