Question

the main goal of the allied leaders at the potsdam conference was to
find a way to force germany to surrender.
agree on strategies to defeat japan.
finalize the decisions made at yalta.
make plans for the united nations.

Explanation:

At Potsdam, Germany had already surrendered. The focus was on Japan and finalizing Yalta - related matters.

Answer:

agree on strategies to defeat Japan., finalize the decisions made at Yalta.