Which detail from the text refines the theme of the betrayal in the passage?
(From who is Silvia, from the Shakespeare Story-Book)
A. She returned his affection, and they became secretly betrothed...
B. ...Valentine in the full glow of his unsuspicious nature, was ready to place unbounded trust in his friend.
C. ...Proteus repeated to the Duke of Milan what Valentine had told him.
D. But what a base return Proteus made for the kindness heaped on him!