In preparation for answering questions at the end of her presentation, Nila should follow these guidelines:
- She should provide brief, to-the-point answers to questions.
- She should offer a resource when she does not know the answer.
- She should anticipate possible questions beforehand.
The other options (giving comprehensive long-form answers, refusing to address difficult questions, and pretending to know the answer) are not advisable and can hinder her effectiveness during the Q&A session.