Dr. marcia assigned students a paper in which they had to support the side of a controversial topic they did not agree with. before asking the students to write the paper, she gave them a survey to determine how strongly they disagreed with the topic. after the students wrote their papers, dr. marcia gave them another survey to rate their disagreement with the topic. she observed that the students’ feelings about the topic became more strongly in agreement with the topic. which of the following is the best conclusion?