Final answer:
Christina Rossetti's writing was most affected by her religious beliefs and personal experiences, with her education and family background also contributing to her literary work.
Step-by-step explanation:
Christina Rossetti's writing was significantly influenced by her religious beliefs, personal experiences, and to some extent, her family background. Rossetti was known for her devout Anglican faith, which permeated much of her poetry and prose. This is evident in her use of biblical themes, moral introspection, and the exploration of concepts such as redemption and salvation.
In addition, the impact of personal experiences can be seen in her works reflecting on emotions such as love, loss, and longing; these themes often intermingle with her spiritual musings, providing a multifaceted perspective on her life and times.
While her education and family background also played roles in shaping her literary output, it was her faith and personal narrative that left the most indelible marks on her writing. Rossetti's brother, Dante Gabriel Rossetti, was a co-founder of the Pre-Raphaelite Brotherhood, which indirectly influenced her through exposure to the ideas and artistic trends of the period.