Answer:
C. Transcription
Step-by-step explanation:
The diagram shows translation, where mRNA is translated by a ribosome to create a specific amino acid sequence.
Transcription must occur before translation, because it is the process where mRNA is made.
In transcription, mRNA is transcribed from DNA, then it is sent out of the nucleus and into the cytoplasm.
Then, the mRNA goes to a ribosome in the cytoplasm, allowing for translation to occur.
So, the correct answer is C. Transcription