Answer:
B. Cells
Explanation:
A: While many multicellular organisms do contain organs made up of multiple cells, individual cells also contain membrane-bound organelles.
B: This is likely the correct answer, because "cells" is plural and refers to more than one cell. All organisms that are made up of more than one cell are considered multicellular organisms.
C: All organisms, multicellular or unicellular, contain energy to function.
D: You could say that everything in the world has their own set of "traits", so this answer is incorrect.
Therefore, B is the only answer that makes sense.
