Verified Answer :

Aside from wanting the Yalta Conference to create an image
of preserver of the human rights of the free people, President Roosevelt wanted
to create a declaration on liberated Europe because he wanted to establish the
United Nations prior to the Second World War’s end. On the other hand, Prime
Minister Churchill wanted to complete the said declaration because of the
rising power that Soviet Union which was then continually ravaging Europe’s
people and economy. 

Answer:

(basically is B.) They wanted to curb Joseph Stalin’s power and limit the spread of the Soviet Union.

Explanation:

have a great day peeps :)