A suffix is found where in a word?

A suffix is a word element that is attached to the end of a word to modify its meaning. Therefore, it is found at the end of a word, making option C the correct answer. Options A and B are incorrect because prefixes are found at the beginning of a word, while infixes (which are not commonly used in English) are found in the middle of a word. Option D is also incorrect because suffixes are always found within the word, not outside of it.