The right option is; C. occupied territory
In this scenario, Poland was an occupied territory.
An occupied territory is a territory that is occupied by a hostile and aggressive armed force. This type of territory is placed under the authority and effective control of the forces that occupies it. In 1939, Germany invaded Poland, and the Polish armies were defeated within weeks of the invasion. After some months, Germany directly joins some Polish territories along German's eastern border, while the remaining Polish territories were placed under a civilian governor general.