Which of These Series Arranges Microbes from Smallest to Largest $\rarr$

Which of these series arranges microbes from smallest to largest?

A) virus $\rarr$ bacterium $\rarr$ red blood cell $\rarr$ paramecium
B) virus $\rarr$ red blood cell $\rarr$ bacterium $\rarr$ paramecium
C) bacterium $\rarr$ virus $\rarr$ paramecium $\rarr$ red blood cell
D) bacterium $\rarr$ virus $\rarr$ red blood cell $\rarr$ paramecium
E) paramecium $\rarr$ red blood cell $\rarr$ bacterium $\rarr$ virus