选项C是什么意思呢？

问题如下：

Which of the following is most likely to cause the convergence of incomes between developing and developed countries over time?

选项：

A.

The labor force participation rate.

B.

Diminishing marginal productivity of capital.

C.

Capital deepening investment.

解释：

B is correct.

Given the relative scarcity and hence high marginal productivity of capital in developing countries.The growth rates of developing countries should exceed those of developed countries.This leads to convergence in income levels over time.

考点：经济趋同

解析：由于 marginal productivity of capital在发达国家表现的比较明显，而在发展中国家表现的比较不明显，所以在此前提下，相对于发达国家，发展中国家会经历一个高速的经济增长阶段，最终实现两类国家的经济发展趋同。所以只有B选项的说法是正确的。