Swarming Is

Multiple Choice

Swarming is:

A) many bacterial colonies crowded together at one place on the agar plate.
B) when colonies on a blood agar plate have a "halo" around the bacterial colony.
C) when a bacterial colony on a blood agar plate grows over the top of the erythrocytes it hemolyzed.
D) a hazy blanket of growth on the surface of the agar that extends way beyond the streak lines.