Portfolio rebalancing restores the portfolio to its target asset allocation after market movements cause some holdings to drift above or below their intended weights. Securities or asset classes that have performed strongly may become overweight, increasing portfolio risk beyond the client’s investment policy. Securities that have performed poorly may become underweight. The disciplined rebalancing process is to sell part of the overweight positions and buy underweight positions, assuming they remain suitable within the portfolio strategy. Option A does the opposite and would increase concentration in winners. Options B and C focus on creating cash rather than restoring the target allocation. The correct rebalancing action is to sell outperforming overweight holdings and buy underperforming underweight holdings.