Answer:
A. Ribosomes
Step-by-step explanation:
Universal features of all cells are features that are shared by all cells whether the cells are prokaryotic or eukaryotic. 
These universal features include; ribosomes, plasma membrane, DNA and cytoplasm. 
Ribosomes are organelles that are responsible for the synthesis of proteins through translation process. 
DNA is the genetic material in a cell. Plasma membrane is the outer covering of cell that regulates the movement of materials in and out of the cells. 
Cytoplasm on the other hand is the part of a cell where all cellular structures are suspended.