Respuesta :
The third choice, because it does not state where the idea came from
The inappropriate way to include the quotation in an essay will be "Normally tusklessness would occur only in about 2 to 4 percent of female African elephants."
What is quotation?
Quotation refers to the piece or group of words taken form the speech of someone else or other's literary work. Including quotation in an essay makes it more interesting for the reader.
While including a quotation in an essay, the writer must quote the source from where the information has been taken. Therefore, the option that doesn't includes the source information cannot be an appropriate way.
Therefore the correct option is C.
Learn more about quotation here:
brainly.com/question/1434552