What caused the evacuations from the extermination camps to turn into death marches? a. being mistaken as the enemy and shot at by the advancing allied powers
b. attacks by wild animals during the marches through the forests
c. poor health of the prisoners and the extreme weather conditions
d. execution of all marching prisoners and burial in mass graves by the nazis

d. execution of all marching prisoners and burial in mass graves by the nazis

Explanation:

During the World War 2, the allied powers were winning he war in all front leading to panicking by the axis power on what to do with the prisoners which are in the various camps that was setup. In order to cover the atrocities that was carried out in the death camp, they had no other option than to execute all the remaining prisoners and bury them in mass grave.