This question is about identifying the correct tense for an action that started in the past and continues to the present. The correct answer is 'B. Present Perfect' because it is used to describe actions that have started in the past and are still ongoing. 'A. Past Perfect' is used for actions that were completed before another past action, which does not fit the description. 'C. Future Perfect' is used for actions that will be completed by a certain time in the future, which is not relevant here. 'D. Past Continuous' is used for actions that were happening at a specific time in the past, which does not imply continuation to the present.