From the play "The Diary of Anne Frank," why do you think the playwright chose to omit the information about Anne's grandmother?

The playwrights Albert Hackett and Frances Goodrich probably omitted the information about Anne's grandmother in order to fit more vital information into the play's predetermined length of time. In the book itself, Anne Frank: The Diary of a Young Girl, there are only a few sentences that mention Anne's grandmother. Furthermore, Anne started writing in her diary after her birthday in 1942. The first entry is Sunday, 14 June, 1942, which was almost six months after her grandmother died the previous January. Since the grandmother died before the Franks went into hiding in early July of 1942, not only is there little information written about her in Anne's diary, but she did not take part in the main focus of the play, which is living in the Secret Annex for two years. Therefore, there was no reason to include Anne's grandmother in the script of the play.