How does this information connect to the setting, providing indirect characterization?

Read this passage: i think of you daily, my darling, especially when it’s dark and the other men in the foxhole become silent. i like to pretend that the gunfire is a fireworks display and that you are here with me to enjoy it. who is the intended audience for this passage? a. the writers girlfriend at home b. the writers fellow soldiers c. the writers mother and father d. the writers commanding officer