Most men and women pass through life without ever considering or criticizing【1】their own c

Most men and women pass through life without ever considering or criticizing【1】their own conditions or those of the world at large. They find themselves born into a certain place in【2】, and they accept what each day【3】, without any thought beyond what the immediate present requires. They seek the【4】of the needs of the moment, without much forethought, and【5】thinking that by sufficient effort the conditions of their lives【6】be changed. A certain percentage, guided by personal ambition,【7】the effort of thought and will which is necessary to place themselves among the more fortunate members of the community; but very【8】among these are seriously concerned to secure for all the advantages which they seek for【9】. Only a few rare and exceptional men have that kind of love toward【10】at large that makes them unable to endure patiently the general mass of evil and suffering,【11】of any relation it may have to their own lives. These【12】, driven by sympathetic pain, will seek for some new system of society by which life may become richer, more full of【13】and less full of preventable evils【14】it is at present. But in the past such men have, as a rule, failed to interest the very victims of the injustices【15】they wished to remedy.

(1)

A．if

B．either

C．when

D．both

请帮忙给出正确答案和分析，谢谢！