Answer:
C. mRNA out of the nucleus.
Step-by-step explanation:
The nucleus is the central organelle that controls the activities of the cell in living organisms. In eukaryotic organisms, a membranous covering called NUCLEAR MEMBRANE surrounds the nucleus and protects the genetic material (DNA) located inside the nucleus.
However, there are numerous tiny pores embedded within the nuclear membrane, whose function is to allow the back and forth movement of materials between the nucleus and cytoplasm. Examples of those materials is the movement of mRNA out of the nucleus into the cytoplasm after transcription.