Question $13(1$ point$)$

$23.$ During the $18$th century European hospitals had $80\%$ death rates. Identify what was the most important advancement that greatly decreased hospital death rates

a$.$ Joseph Lister's sweeping disinfection practices

b$.$ Improved foods that boosted the immune system

c$.$ The advent of vaccinations

d$.$ The introduction of antibiotics

e$.$ Clean running water