A) The Guardianship Act was passed in 1944 to provide care for those children who were not adopted, unmarried or under the age of 21.
The question is looking for evidence that explains the efforts of Britains to help Jewish refugee children. Option D says that the transports stopped so this doesn't show aide. Option B talks about what happened after the war, not what happened during the rescue. Option C gives details about what the families of refugees needed to pay, but doesn't show the efforts of the British. Option A is the only option that actually demonstrates Britain's efforts. It explains that act that was passed to protect the children transported out of Nazi-occupied territories.