As per the question, all the given options exemplify ineffective listening styles except for the 'signal listening' as it employs verbal signals to convey a particular idea or message to the readers effectively that the author repeatedly mentions in the text. These signals assist the readers to listen attentively/actively and understand the intended idea productively that would aid to elicit desired response/outcome from them. This listening style is most effectively employed by the author in the text. Thus, <u>'signal listening'</u> is the answer.
