Final answer:
Eugene Debs suggests that socialism will resolve issues such as poverty and the ongoing struggles of the working class, attributed to the failings of capitalism.
Step-by-step explanation:
According to Eugene Debs, socialism will resolve significant socio-economic issues created by capitalism. The problems that socialism aims to address include poverty, economic exploitation, and the endless struggle of the working class that capitalism exacerbates. Specifically, Debs implies that socialism will end poverty and the life-long struggle experienced by the working class, indicating that option D is the most appropriate choice.