Which phrase would logically respond to a question starting with quandō, meaning "when"?

The phrase "Mediā nocte," which translates to "In the middle of the night," is a logical response to a question beginning with "quandō," meaning "when." This is because it specifically provides a time reference, answering the inquiry about the timing of an event.

The other choices do not adequately address the time context implied by the question. "Ibi" means "there" and does not provide any temporal information. "Quattuordecim" translates to "fourteen," which is a numeral and does not relate to time at all. "Propter tempestātem," meaning "because of the weather," explains a cause but does not directly answer a question about when something occurs. Thus, "Mediā nocte" is the most appropriate response as it clearly indicates a specific time.