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

Option B

Explanation:

Had blocked Germany in on three sides, is the correct answer.

This blockade was an economic war that lasted from 1939-1949, It was a part of the Battle of Atlantic. It was carried out by France and the United Kingdom. It consisted of the Naval blockade of Germany to prevent Food, Minerals and other necessary commodities from reaching Germany. The blockade was executed in four distinct phases. Till 1941 the blockade was unsuccessful because Germany was getting supplies from Spanish ports and from USSR.

a. the astrolabe could determine the correct latitudinal location of the ship

i believe that the correct answer is a canadian hero.

explanation: he is celebrated as a national hero in canada for successfully thwarting a united states takeover of canada during the war of 1812.