Final answer:
Rhetorical techniques, charts and graphs, and attention-getting facts are effective elements in opening statements about the rising costs of higher education.
Explanation:
Rhetorical techniques, such as using engaging language and rhetorical questions, can effectively capture an audience's attention in an opening statement about the increasing costs of higher education. Utilizing charts and graphs to visually represent the cost trends can provide concrete evidence to support the argument. Additionally, starting with an attention-getting fact or statistic, like the current total student debt, can help establish the seriousness of the issue.
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