What steps would one take to ensure that the purpose of your message (whether informative, negative, or persuasive) is conveyed to your readers?
As already answered:
http://www.jiskha.com/display.cgi?id=1161095998
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what kinds fo unwanted reactions might one get from readers of ones messagae?
http://www.jiskha.com/display.cgi?id=1181175496