HELP:Point: Espionage in the American Civil War relied more on people’s skills than on gadgetry and inventions. Which sentence best illustrates this point?

Some spies were executed for their involvement in gathering intelligence for the South.
Spies gathered intelligence from letters, newspapers, and interviews with prisoners and deserters.
Use of photography and the telegraph slowly transformed spying into a scientific vocation.
Spying during the Civil War evolved significantly from the amateur efforts of the Revolutionary War.

Why does the author's description of the mercury boiler—"the mercury, when vaporized, going into a mercury turbine and then into a condenser, remaining hot enough to generate steam in a steam boiler"—intentionally incorporate such highly technical language? using technical language establishes the expertise of the writer and convey the complex nature of the process being described. using technical language allows the writer to subtly poke fun at those who seek to make basic processes seem overly complicated. using technical language encourages readers to develop deeper and more meaningful personal connections to the information. using technical language lets the writer make clear to readers that the article is intended for readers who are themselves experts on electricity.