The discovery of cells is most directly linked to the
a. development of the microscope.
b. early studies of disease and its causes.
c. observations of large, unicellular organisms.
d. reproduction of organisms in a lab setting.

A. The development of a microscope.
I think it is a because with a microscope, the scientists could actually see the cells

Ifound this on google “aristotle (384–322 bc) in western scientific taxonomy the greek philosopher aristotle was the first to classify all living things, and some of his groups are still used today, like the vertebrates and invertebrates, which he called animals with blood and without blood.” i hope this you for what your looking for.

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