In lab exercise 6, you observed red blood cells added to a test tube containing 0% NaCl. Which description below describes the results of the experiment?

a. Hemolysis occurred, causing the red blood cells to swell and burst.
b. Crenation occurred, leading to the shrinkage of red blood cells.
c. There was no observable change in the red blood cells.
d. Red blood cells clumped together due to agglutination.