질문 내용 :the earliest map is thought to have been made in 7000 b.c. in an ancient city that was in [what/which] is now present-day turkey.

어느 것이 정답이고 왜 그런지 설명좀 부탁드립니다.
핫생 학교에서는 which 가 답이라고 했다고 하네요...