To grab the readers' attention is the first and foremost purpose of an oral response presentation as it assists to convince them to believe and accept the ideas and thoughts presented. Thus, the very opening of such a presentation has to be appealing that captures' the readers' attention and foregrounds a positive image into their minds as it helps to further explain and elaborate the topic more conveniently. To do this, the thesis should be presented effectively and creatively that appeals to the readers either logically or emotionally. It would aid to evoke the desired response from them. Thus, <em>the opening of an oral response presentation should capture the readers' attention and hence, the answer is option C.</em>