Answer: Italy
A peninsula is an extension of land that is surrounded by water everywhere except for an area or a narrow strip of land (isthmus) that links it to the mainland.
In this sense, of the three countries of the options given, the only one that meets this condition is Italy.
This country is one of the largest peninsula in Europe and is located in the center of the Mediterranean Sea (specifically between the Tyrrhenian and Adriatic seas).
