The poet's mother was nearly twelve years old when the photograph was clicked. However, there is no mention of what was the age of the poet's mother when she died. All we know is that she has been dead for as long as twelve years now.

The Answer to the question "When did her mother die?" is option 'D', which means her mother died twelve years ago.

Reasoning:

There is no context or information given in the question to help us determine the exact time or age of the person asking the question. Therefore, we have to focus on the given options to arrive at the correct answer.

Option 'A' states that her mother died two years ago, which means the person would have a recent memory of her mother's death. Option 'B' states that her mother died five years ago, which could still be a relatively recent memory for some people. Option 'C' states that her mother died thirteen years ago, which is a long time ago, and it is unlikely that the person would still be asking this question after so many years.

Option 'D' states that her mother died twelve years ago, which is a reasonable amount of time for someone to ask about their mother's death. Therefore, we can conclude that option 'D' is the correct answer.

Summary:

- The person asking the question's age is not given.
- Option 'A' and 'B' are relatively recent memories, while option 'C' is too far back in time.
- Option 'D' states that her mother died twelve years ago, which is a reasonable amount of time for someone to ask about their mother's death.
- Therefore, option 'D' is the correct answer.

Who is the narrator of the story, the summer of the beautiful white horse