Concept:Special characters such as currency signs are inserted or replaced using the Symbol tool in Microsoft Word.Explanation:The dollar sign ($) and Ghana cedis sign (₵) are special symbols not usually typed directly on a standard keyboard.To replace the dollar sign with the Ghana cedis sign, the secretary can use the Symbol tool to find and insert the cedis sign.Using the find-and-replace feature, the secretary can search for the dollar sign and replace it with the Ghana cedis symbol inserted from the Symbol tool.Answer:C. symbol tool.