What is the most likely meaning of brawling as it is used in the following sentence? Use context clues to help you.

At the political rally, the two groups argued, and soon the crowd turned into a
brawling mob with shouting, pushing, and violent shoving.

A. stubbornly disagreeable
B. violent, rash, and unpredictable
C. strongly and fully engaged or committed
D. noisy, quarrelsome, and physically rough