The example that supports the theme of knightly virtue is: B. "l am bound by my vow to do so,". . . .
A knight is a person who is appointed to serve a king or a senior soldier. Courage and loyalty are qualities that are required of knights.
In the example chosen above, we see that the knight states that he is bound by his vow to take a certain action. In so doing, he displays loyalty to his superior.
So, option B is an example that supports the theme of knightly virtue.
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