The correct answer is the following: option c. The fact that most 1st graders are familiar with the food that Martin's class is teaching them how to make is a key element in the effectiveness of the group's speech. When giving a speech or a demonstration to a group of people it is important to know how that audience works, and who are the people that makes it, in order to asses what is relevant and irrelevant to them and therefore produce a message is that is engaging. When Martin's group decides to make peanut butter and jelly sandwiches as their demonstration, they are showing good decision making as that type of food is a popular item between kids of that age, therefore they are creating engagement with the audience.