According to john locke, primary qualities of an object are what?
a. innate ideas to the mind
b. intrinsic features of objects of reality
c. dependent on an observer
d. none of the above

Explanation:

For Locke, primary qualities resemble their causes in the world like shapes, numbers and textures. In other words, they are properties of the objects that are indepedent of any observer, universal we could say. For example, a color can be perceived differently by different people, but numbers cannot be perceived different around the globe.

So, if you look each choice, you would notice that any of A, B and C are primary qualities, they don't resemble their causes, they are not essentially universal.

Therefore, the right answer is D.

because if the tool that you are using is not balanced it there would be false mass.