Answer:
A.The spread of Soviet-style communism in Europe.
Step-by-step explanation:
The speech corresponds to Harry Truman declaration, foreseeing spread of Soviet influence and communist uprisings in Europe.
The Truman Doctrine, as it is know foreseeks the takeover by USSR, as Stalin expectactions at the Yalta Conference came short.
The British goverment had been actively helping Greeks resis Communist militias, but shortly announced that the support for keeping an army on Geek soil was unafordable.
The Truman speech is the predecesor of the policy of "containment",
Truman argues"
I believe that it must be the policy of the United States to support free peoples who are resisting attempted subjugation by armed minorities or by outside pressures. "