The unpleasant feeling passed and she glanced guardedly up ,at him. He was walking unmarked in moonlight, innocent of her reaction to him. She felt then - this thought had come to her before - that there might be more to him than she had imagined. She felt ashamed she had never thanked him for the help he had given her father.
She was ashamed because

Options

A. She was spying on him
B. There was more to him than she had imagined
C. A recurring thought came back to her
D. She had never thanked him for his help to her father