When microscopes were first used hundreds of years ago, scientists discovered that a single drop of water contains
many particles that the human eye is unable to detect on its own. The microscopes used today are much more
powerful and have allowed scientists to make discoveries about smaller living things, such as how germs can make
people sick. Which statement best describes the use of microscopes over the last several hundred years?
A) Advancements in technology have led to new scientific discoveries.
B) Experiments have been repeated to make sure the results are reliable.
C) Scientists have used proper units to communicate results with other scientists.
D) A lack of money has forced scientists to conduct smaller studies over time.