By the end of 1944, during the last days of nazi germany, allied forces
were about to take over the soviet union.
had blocked germany in on three sides.
had lost most of their air support.
could no longer hold normandy.

The correct answer is B) Allied Forces had blocked Germany in on three sides.

By the end of 1944, during the last days of Nazi Germany, Allied forces had blocked Germany in on three sides.  

During the final months of World War II, the Allied Forces started a series of operations to capture Germany and ending with the Nazi regime. The aim was to capture the West and East bank of the Rhine River. In February 1945, the Allied Forces launched Operation Veritable and Operation Grenade. One month later they launched Operation Undertone and Operation Lumberjack. They had different code names for the operations to disguised in the extreme case the communications were intercepted by the enemy. So by the end of 1944, during the last days of Nazi Germany, Allied forces had blocked Germany in on three sides.