Mr. and Mrs. VanDaan joined Anne Frank and her family while they are in hiding. Therefore, they could not have protected them and brought them food since they are hiding too. Margot is Anne's sister so she was also in hiding. This leaves the only option as option A, Miep and Mr. Kraler. They were people that Mr. Frank trusted with their secret. Miep and Bep actually found Anne Frank's diary and kept them safe.
Young people have a better ability to initiate a positive change in their communities. They have better technology. They could use technology to grow and expand and build up their communities.