Also, for the other two-word answers where an adjective was expected, the second name was already given : "Forbidden City", "Flavian Amphitheatre". Why is it different here ?
Florey should be an answer here.
NXIVM wasn't "suppressed", let alone brutally: the handful of members who have been imprisoned were so treated after conviction of serious sexual crimes.
The only government action taken against the People's Temple was the beginning of a Congressional investigation and visit.
Your analogy is absolutely terrible, and terribly inapt.
As for the question: whether Falun Gong's suppression is "brutal" is independent of whether the cult holds offensive or wacky beliefs or engages in grossly discriminatory claims. At most, the question lacks nuance, but how much nuance is it reasonable to expect from a trivia quiz question?
found frequent use could also be the First Republic of France (1792-1804), which is the period which included the Reign of Terror. That was my first guess, but then the answer was actually far easier.