Question

Pictured is a ribosome. How are ribosomes different from most other cell organelles?

Answer 1

THE CORRECT ANSWER IS C.

Answer 2

C. They are not enclosed by a membrane. 

D is incorrect because Ribosomes do not contain DNA, the nucleolus does.
B is also incorrect because they aren't located outside the cell, they're in the cell, on the endoplasmic reticulum.

Hoped this helped :)