(1) It was just an ordinary Friday morning, August 4, 1944. . . . Elli Vossen and Jo Koophuis were working across from me in the office. (2) Sometime between eleven and twelve o'clock, I looked up. (3) There in the doorway stood a man in civilian clothes. (4) I hadn't heard the door. —Anne Frank Remembered,
Miep Gies

Which sentence is the best evidence that the passage is from a memoir and not an autobiography?

the second sentence
the first sentence
the third sentence
the fourth sentence