Question

doing science: measure and know
news: science scene
until about three hundred years ago, people who studied nature were called natural philosophers. they were mostly thinkers. they did not run experiments. lets say that you lived during that time. if youd wanted to know what cold was, you wouldnt have set up a lab and started studying ice. instead, you might have thought about how cold and hot climates change a persons ideas or health. you wouldnt have measured cold to figure out what it was. the idea would have been unheard of. why? there were no instruments for measuring back then.
scientific instruments help scientists find evidence and build new theories, or ideas, about nature.
question 4
why didnt early natural philosophers use measurements?
a. there were no instruments.
b. they thought the instruments would scare nature.
c. they thought the instruments made mistakes.
d. they disliked using machines.

Explanation:

The text explicitly states that early natural philosophers didn't use measurements because "there were no instruments for measuring back then." This directly corresponds to option A.

Answer:

A. There were no instruments.