A short stay at a place

Option A is the correct answer.

"Sojourn" refers to a temporary or short stay at a place, making it the best match for the phrase "a short stay at a place."

Option B: Interlude refers to a break or pause, usually in a performance or event, not a stay.
Option C: Gap refers to a space or break between things. This is not a stay.
Option D: An interval is a short period of time between events or activities, and it need not involve a stay at a location.