From my English experience, choice B) would probably be the best fit
The verb dictate means to give an order that must be obeyed. From the excerpt, we can assume that the words duty, honor, and country should be our guidelines. The ideas behind those words must be followed, for they tell us what we ought to be, what we can be, what we will be.
The verb dictate could also mean to speak or read to a person. In this excerpt, however, that meaning does not apply.
Did you read Harry Potter when you were on holiday?
