The following question has the second sentence missing. Choose the appropriate sentence from the given options to complete it.
A. Anne Frank began to keep a diary on her thirteenth birthday, June 12, 1942, three weeks before she went into hiding with her family and friends in the sealed-off upper room of the annex of the father's office building in Amsterdam.
B. __________________________________________________________ .
C. They were, however, betrayed in August 1944 and were deported to the Nazi concentration camp.