Final answer:
The existence of more elderly men than women in a nation's population could suggest various socio-economic and health factors but does not directly correspond with the options stated. Women typically have a longer lifespan, and a higher ratio of elderly men could be the result of economic activities attracting male labor or other region-specific factors.
Step-by-step explanation:
If a nation has more elderly men than women in its population, this does not likely mean that A) a lot of women die in childbirth, B) men forbid women from seeing doctors, or that D) the population is healthy because there are usually more men. Instead, it could suggest various socio-economic and health factors at play, but given the choices, none of these directly point to the reason behind more elderly men than women in the population.
Globally, the sex ratio should be near 1:1 for men to women without the impact of cultural factors. However, this ratio can be skewed for several reasons, such as higher infant mortality rates for one gender, or one gender having a higher average lifespan than the other.
Typically, women live longer than men due to a variety of factors including biological, behavioral, and lifestyle choices and, therefore, there are usually more elderly women than elderly men in a population. However, in some cases where there are particularly arduous economic activities that attract male labor, or where there have been conflicts or specific health crises that have impacted men differently, the ratio can be skewed in favor of men.
Based on the provided information, none of the given options directly answer why a nation might have more elderly men than women. Therefore, it is possible that the question is misleading or that the options do not encompass the possible explanations. Moreover, evidence from populations shows that demographic changes, including sex ratios, are often influenced by economic development, educational opportunities for women, and advances in gender equality.