对于current yield的权重最高，能够提供的现金流是最稳定，这个逻辑怎么推导了

问题如下：

Q. Which of the following has the highest weighting to current yield?

选项：

A.Greenfield assets with limited construction and demand risk

B.Fully constructed brownfield assets with contracted revenues

C.Greenfield assets without guarantees of demand upon completion

解释：

The correct answer is B. Brownfield assets with mitigated risks (e.g., fully constructed with contracted/regulated revenues) that are located in the most stable OECD countries have a high weighting to current yield. Greenfield assets with limited construction and demand risk have a mix of yield and capital appreciation. Greenfield projects without guarantees of demand upon completion—e.g., variable electricity prices, uncertain traffic on roads and through ports—have a high weighting to capital appreciation.