The correct option is A single membrane-bound organelles
Endomembrane system includes cell organelles that work in a coordinated way to modify, package and transport lipids and proteins. The endomembrane system includes endoplasmic reticulum (ER), Golgi complex, lysosomes and vacuoles which are all single membrane-bound organelles.
The double membrane-bound cell organelles include the nucleus, mitochondria and the plastids.
Non-membrane bound organelles include the ribosomes.
The double membrane-bound organelles and non-membrane bound organelles are not part of the endomembrane system.