An individual who is monitoring one’s goal-achieving behavior is demonstrating which phase of the self-regulation cycle?
a. self-reflection
b. performance
c. forethought
d. goal accomplishment

The individual who is doing this - and this is commendable as self-monitoring is a very important concept in social psychology - is exhibiting performance. 

Because he's achieing and in the process of doing goal-achieving behavior, he is also performing. And with him monitoring his own performance he's importantly contributing to his own future success.

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey