What is the correct transformation of a future plan mentioned in a sentence?

The correct transformation of a future plan is represented by the choice that communicates an intention or plan that was established prior to the moment of speaking, indicating a sense of prior commitment to that action.

The phrase, "I was going to visit her," suggests that the speaker had intended to make that visit at some point in the future relative to a previous time, reflecting a plan or decision that was present before another action or event occurred. This construction emphasizes the idea that there was a prior intention that may or may not be relevant at the time of speaking.

In contrast, the other options convey different nuances about future intentions or commitments. They speak to present or hypothetical plans rather than capturing the sense of a previously established future plan in the same way. Thus, the selection effectively aligns with the requirements of transforming a future plan by focusing on the timing and context of the intention.