Studies conducted by Haselton and Galperin have found that sexual selection may have favored men who were too suspicious of their partners' faithfulness over those who were not suspicious enough. This is because men face potential evolutionary costs in:

The correct answer is : raising children who are not their own

Explanation:

It happens when there is a correlation between the gender of a person and hir or her parental investment in each offspring. It is often considered powerful enough to produce specific features in an individual's life. we can see a simple example when there are genetically based differences in the ability of one sex to insure successful mating with the other one.

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.