Answer;
B (Nucleus)
Step-by-step explanation;
-The nucleus is an organelle found in eukaryotic cells. Inside its fully-enclosed nuclear membrane, it contains the majority of the cell's genetic material (the cells DNA ).
- It contains coded instructions for making proteins , it has nuclear pores that allow material to move in and out . It has chromosomes carry genetic information and also a nucleosome where ribosomes are assembled.