This is a typical essay question, so start off by defining key terms for later use in the answer, such as what a trade-off is, and what the other macroeconomic objectives are. Then, go on the apply and analyse knowledge about how to primarily reduce unemployment (supply and demand side measures).
Then, analysis of what conflicts might arise is appropriate, such as the well known conflict with inflation. Evaluate using issues such as LR vs SR and what policies what would bring about what conflicts.