I'm pretty sure that it's D.
I would say that student activism received so much media attention because all of the above - because they were vocal, because they challenged the silent majority, because they were willing to question authority in an attention-getting manner, because their protests often ended in violence and disorder.
I believe the answer is b.
Answer:
Thug, Punk, Hoodlum, Criminal, Felom, Convict, Gangster
