C. Tsaritsyno is ...

1) a park only. Tsaritsyno is not only a park, so this answer is not correct. 2) not only a park. This is the most likely answer, since Tsaritsyno is a park, museum, and historical site. 3) a museum only. Tsaritsyno is not only a museum, so this answer is not correct. Correct answer: 2