The detail from the diary of a young girl that best supports the mood of terror and anxiety is:
"whatever we do, we're very afraid the neighbors might hear or see us."
The correct answer is option B.
Option B reflects a heightened sense of fear and anxiety in Anne Frank's diary. The phrase "whatever we do, we're very afraid the neighbors might hear or see us" suggests that the characters are living in constant fear of being discovered or exposed. This fear implies a precarious and unsettling situation, contributing to the overall mood of terror and anxiety.
The use of the words "very afraid" emphasizes the intensity of their emotions, and the concern about the neighbors hearing or seeing them adds an element of secrecy and danger to their situation. The fear of being discovered likely stems from the life-threatening circumstances that Anne Frank and her family faced while hiding from the Nazis during the Holocaust. This detail captures the oppressive atmosphere and constant tension that characterized their daily lives, reinforcing the mood of terror and anxiety in the diary.