Which statement is true comparing natural selection and artificial selection? A: In natural selection, traits benefit humans and in artificial selection, the traits
benefit the species
B: In natural and artificial selection, the process takes hundreds of years to occur.
C: In natural selection, traits benefit the species and in artificial selection, the traits
benefit humans.
D: In natural and artificial selection, nature determines what traits will be passed
down to offspring.

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?