Option 1: She has not yet realized what it means to be in hiding.
By the time Anna and her family had to hide from the Nazis, in the mids of World War II, she was only 13 years old approximately. Their new situation (Coming from a home where they could freely come and go to a hiding place), the complex war and the threat of the ruthless Nazis might have been a whole new thing to process, and hard to completely realize.
From the dialogue, it's clear that she hasn't realized what it meant to be in hiding and all that it implied.