Final answer:
The Frank family went into hiding because the German authorities were deporting and exterminating Jewish people, which aligns with option D. Despite initially moving to the Netherlands for safety, the Nazi occupation led to their eventual capture after two years in hiding.
Step-by-step explanation:
Anne and her family went into hiding primarily because the German authorities were sending Jewish people to concentration camps and killing centers. This response aligns with option D from the provided choices. As the Nazis intensified their discriminatory and violent persecution of Jewish people, the Frank family sought refuge to escape the imminent threat of deportation and extermination.
The German-Jewish Frank family originally moved to the Netherlands in 1933, seeking safety from the Nazi regime, which at that time was implementing policies such as the boycott of Jewish businesses, dismissal from civil service, and enacting the Nuremberg Laws that institutionalized racial discrimination against Jews. However, with the Nazi occupation of the Netherlands in 1940, the situation for the Jews worsened significantly, and by 1942, deportations of Dutch Jews to concentration camps commenced.
The Franks went into hiding in an annex with the help of Dutch friends active in the resistance, but were eventually discovered in 1944 and sent to the camps. Anne Frank's diary, written during their time in hiding, has become one of the most poignant documents of the Holocaust, detailing the day-to-day struggles and hopes of the family in seclusion. Despite this, the true extent of the Holocaust, as evidenced by German records and the harrowing accounts of survivors and victims, cannot be denied with new details about the scale and reach of the atrocities continuing to emerge.