Answer:
A. Aided the frank family when they came to Holland.
Step-by-step explanation:
"The Diary of A Young Girl" was written by a young Jewish girl named Anne Frank. This diary, though it covers only a short period of time, would later become one of the most important and evidence for the Nazi's regime under Hitler and their racial discrimination of the Jewish people. And the play "Anne Frank" is based on the life-in-hiding of this girl and her family.
When the Franks first came to Holland in Amsterdam in 1945, they were unable to get by easily due to the language barrier. But Mr. Van Daan helped them, which would become one deciding factor for the Franks to help and allow the Van Daans to be with them in hiding. By allowing them into the hiding place at the Secret Annex, Mr. Frank feels he needed to repay Mr. Van Daan for helping him when he needed help the most and this was his way of doing the same in return.
Thus, the correct answer is option A.