The answers to this question are blank so it is difficult to say for sure what the best molecular level representation after the reaction has taken place would be. This question has to do with studying and observing the changes which happen on a molecular level during and after chemical reactions.
You will likely come across questions similar to this one if you are taking a chemistry class or are interested in beocming a chemist. To study these changes, often times you have to use microscopes and other equipment which uses magnification to observe the changes on a molecular level.
There are no actual answers here - just A, B, C, and D, where answer A reads “A”, answer B reads “B”, and so on. There are no diagrams, no descriptions. This makes it impossible to say for certain what the actual answer should be. However, this shouldn’t be that hard for someone who is good at chemistry to figure out.
Since I am not that particularly good at chemistry, I will not attempt to answer this question without a sufficient answer on the list. I would implore the first answerer to expand on how they know it is answer “D” without anything else on the answer list, not only for my benefit, but for the benefit of those who come to this question after me.