Final answer:
The word 'Peice' is the option that exemplifies an exception to the spelling rule, as it does not follow the rule 'I before E except after C.' The correct spelling should be 'Piece'.
Step-by-step explanation:
The question asks which of the given options exemplifies an exception to a spelling rule. The spelling rule commonly referred to is 'I before E except after C' or when sounding like 'ay' as in 'neighbor' and 'weigh'. When long [ē] is spelled right after the letter , it is typically . Therefore, words that do not adhere to this rule are considered exceptions or holdouts.
Out of the options given, Achieve, Deceive, and Peice, only Peice is spelled incorrectly and does not fit the rule 'I before E except after C,' making it an exception. The correct spelling should be 'Piece'. Thus, 'Peice' is the word that exemplifies an exception to the spelling rule.