Answer:
C. Millimeter
Explanation:
A microscope is a measuring device. Least count and small count are not scale divisions they are not accurate which only leaves you with millimeter which is an actual scale division.
The style of art Wassily Kandinsky pioneered is A. Abstract
sculptures: you create them by hand, they are physical
photographs: you capture them in electronics, they can't be touched
both: both pieces of art