Answer:
The correct answer is option C) "Cyanobacteria, a prokaryote".
Step-by-step explanation:
One characteristic of cyanobacteria and prokaryotic cells that distinguish them from eukaryotic cells, is that they perform the processes of transcription and translation simultaneously. The fact that cyanobacteria and prokaryotic cells does not have a nucleus and have its genomic material within the cytoplasm, makes them able to make more efficient its transcription and translation processes. Therefore, it is very likely that the researcher is making her or his observation while studying cyanobacteria, a prokaryote.