which word contains a suffix?\nreverse\nprewrite\nhappiness\ndisbelief

Brief Explanations:

A suffix is a letter or group of letters added to the end of a word. "Happiness" has the suffix "-ness" added to the root word "happy". "Reverse" has no suffix. "Prewrite" has a prefix "pre -". "Disbelief" has a prefix "dis -".

Answer:

C. happiness