What Is the Distinction Between the Strong and Moderate Versions

What is the distinction between the strong and moderate versions of Singer's principle?

A) The strong version requires one to give to famine relief until one is reduced to absolute poverty and can no longer meet one's basic needs. The moderate version requires one to give ten percent of one's annual income to famine relief.
B) The strong version states that one should work to strengthen the economy of one's country so that there will be extra resources that can be contributed to famine relief in other countries. The moderate version states that one should start contributing aid to other countries even before greater domestic economic growth occurs.
C) The strong version states that those most capable of giving to famine relief are strongest and so most obligated to give. The moderate version states that the middle class are the ones who should be giving the most because they constitute the largest section of the population.
D) The strong version requires one to give to famine relief until one is reduced to the level of marginal utility where giving more would cause as much suffering to oneself as would be relieved by giving. The moderate version requires one to simply give as much as possible without sacrificing something morally significant.