The rhetorical appeal that Condoleezza Rice uses in this excerpt is Pathos. Thus, the correct option is D.
The rhetorical appeal may be defined as the standard way of articulating how you operate diverse approaches to convince someone.
The context of this story by Condoleezza Rice illustrates the emotional feeling of her grandfather that should be arises after listening to the challenge faced by her during her college days.
Therefore, the rhetorical appeal which is associated with emotional thoughts and feelings is pathos.
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