Penicillin was widely used to: cure smallpox during the nineteenth centurytreat soldiers during world war 2manager diabetes during the twentieth centuryfight the bubonic plague during the middle ages

Penicillin [antibiotic] was widely used to:
B) treat soldiers during World War 2 (1940s-current)

*smallpox is a virus and not affected by antibiotics
*diabetes is not an infection, therefore antibiotics won't play a role
*plague and middle ages are CENTURIES before discovery of antibiotics

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.