A, B, C, D.
A. First you’ve gotta condense chromosomes. Basically this means you have a bunch of more disorganized and unshapely stuff that’s inconvenient for mitosis to undergo, so the cell says “ok, let’s condense it (make it more compact and concrete).
B. Now the chromosomes are fully condensed and ready to undergo mitosis.
C. Since the chromosomes are ready, now they assemble into a little line at a place called the “metaphase plate.” This is an invisible area (it’s not a physical structure actually in the cell) where the chromosomes naturally know to align themselves. Kinda like getting in line as a kid for something at school.
D. Finally, the microtubules and kinetochore microtubules work together to yank those lined up chromosomes APART. Remember that a chromosome contains two parts: there’s like two noodle-like structures that make one up called “sister chromatids”. That’s the famous x shape you get- it’s just 2 sister chromatids crossed on each other. At the metaphase plate, where they line up, they are ready to be pulled apart. And so those microtubules from before work together to yank the sister chromatids away from eachother as pictured. You can think of it as having those mini KitKats that have only two bars hanging out lined up in the middle. And then they have to be broken apart, so one Kit Kat bar goes to one side, and the other goes to the opposite.
Hope this helps!