Which statement about anaerobic respiration is true? A-Anaerobic respiration prevents muscle fatigue.
B-Anaerobic respiration generates a high yield of ATP.
C-Anaerobic respiration is used commercially in the production of beer, wine, bread, yogurt, and cheese.
D-Anaerobic respiration can provide energy to animals for several days in the absence of oxygen.

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?