According to the story 'The Biography of Yao Qing'er', why did Yao Qing'er initially attempt to take her own life?

A. She was heartbroken after being separated from her family
B. She was attacked by pirates on the Yangtze River
C. Liang Si refused to let her marry Zhan Yingjia
D. She was forced to marry Liang Si against her will
Answer: 