MacArthur wanted to push beyond the 38th parallel, while Truman did not want to risk a conflict with China or the soviet union.
Answer: Option 4.
Step-by-step explanation:
During the Korean war, there was a disagreement between General MacArthur and the President Truman. The disagreement was that General wanted to go beyond the thirty eight parallel and he wanted to attack the people's Republic of China. But Truman was totally against this decision.
He said that if China would be attacked by America, it would directly involve the Soviet union into the war as a support to the people's republic China. So in order to avoid, this, the attack should not be done. Truman did not want to risk this conflict and he declared MacArthur insubordinate.