The correct completion of the sentence is "a las afueras del centro," indicating that the monuments are on the outskirts of the city center. Option A.
The phrase "You answered" fits appropriately in this context.
The sentence suggests the presence of many monuments located on the outskirts of the city center, and "a) You answered" seamlessly completes the phrase, indicating the respondent correctly identified this location.
The phrase signifies the proximity of the monuments to the central area, offering a concise and accurate response.