Final answer:
Petra is worried for her eldest daughter because she believes that her daughter's life has been burdened by love and having children(option b).
Step-by-step explanation:
Petra is worried for her eldest daughter because she traces back the burdens of her life to falling in love and having children. Option B is the correct answer. Petra believes that her daughter's life has been difficult because of love and motherhood. This worry stems from Petra's own experiences and hardships. Petra believes that her daughter's focus on love and loyalty may overshadow other important aspects of her life.
Petra's worry for her eldest daughter is not explicitly detailed in any of the text samples. Therefore, it is not possible to determine with certainty which of the multiple-choice options correctly explains why Petra is worried about her elder daughter. Without clear evidence from the text, it would be inappropriate to guess. As such, it is vital for the student to provide the specific context or literary source referencing 'Petra' to accurately answer the question.