The opposite of unconcerned is concerned, or worried.
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1.Collapse
2.coo
3.Chime
4.frolic
5.foretell
6.modest
7.energetic
8.click
9.ambitious
10.dignified
11.clatter
12.rustle
13.brew
14.slurp
15.crunch
16bravery
17.clomp
18.squish
19.screech
20.lunge
Answer:
B. harmed more patients with infections than they helped with surgery.
Explanation:
Before Joseph Lister was inspired by Pasteur's germ theory to perform sterile operations, doctors harmed more patients with infections than they helped with surgery.
This was because doctors didn't do enough to prevent the spread of bacteria through surgical equipment and in the end they ended up causing more problems for their patients than the help they gave.
Prior to Joseph Lister's sterilisation which was influenced by Pasteur's germ theory, surgeons were unhygienic and didn't wash their hands or change their clothing before surgery which made infections after surgery widespread.
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