Calculating Weighted Average Return Using Initial Allocation

A portfolio manager has two investments in her portfolio, Investment A and Investment B. Over the past year, Investment A earned a return of 12%, while Investment B earned a return of 8%. The manager allocated 60% of the portfolio to Investment A and 40% to Investment B. However, during the rebalancing process, the manager had to sell a portion of Investment A to cover a margin call related to another investment. As a result, by the end of the year, the portfolio's overall return was 10%.

Given this information, what is the weighted average return of the portfolio based on the initial allocation before any rebalancing? Please select the correct answer.