Anurse is conducting an assessment of a client. which client statement would indicate to the nurse that the client has a nonmodifiable risk factor for mental health problems? a) "my father was diagnosed with depression in his 40s."b) "my job has been getting more and more stressful."c) "i drink about a case or two of beer each week."d) "i'm probably going to get evicted from my home."

Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?