Which of the following is true about the structure of an atom?

a. electrons, neutrons, and protons are made up of even smaller constituents, such as quarks and gluons.

b. an atom is not composed of smaller parts and cannot be broken down into smaller constituents.

c. atoms are composed of tiny cells that make up all forms of matter.

The correct answer should be A. Atoms can be broken up into protons, neutrons, and electrons. Protons and neutrons can be broken up into even smaller particles but I am not sure if it has been proven that electrons can be broken up into smaller particles. I hope this helps. Let me know if anything is unclear.

Either X or Y but I don't know what ether is try typing in Google if it is soluble in ether