I just did it and got it correct the answer is inside the circle which is the first one. Good luck on the questions.
The function of the nucleolus is: D. Assembly of ribosomes.
The function of the nucleolus is to transcribe DNA into ribosomal RNA and assemble RNA into ribosomal subunits. The creation of RNA is important because RNA makes up ribosomes which are responsible for protein synthesis in the cell.
We created mathematics, built skyscrapers, traveled to the moon and soon mars, cut atoms in half, walk on two lags, etc.