Personal pride and stong ambition have sustained the speaker
Answer: Option (C) is correct
Explanation:
I think it is personal pride and strong ambition of the speaker that has sustained her. It shows that the speaker is highly ambitious and has immense pride in herself. This helps her a lot in overcoming any kind of disappointment.
Even if currently she is experiencing sadness but she can overcome it as it is temporary and will vanish soon because of her strong ambition and personal pride.