Benchmark Selection for Diversified Fund

John Smith is a portfolio manager overseeing a large diversified fund with assets primarily in U.S. equities, but also with exposure to international equities, bonds, and real estate investment trusts (REITs). In assessing the performance of his fund, John is considering appropriate benchmarks for comparison.

He wants to ensure that the benchmarks reflect the investment strategy of the fund while also taking into account the risk profile and market conditions. John is particularly interested in a benchmark that captures the broad performance of the U.S. equity market but also considers the fund's international equity exposure and alternative assets.

Considering this context, which of the following benchmarks would be most appropriate for John Smith's fund performance evaluation?