Answer:
The word "unprecedented" conveys the following:
A. that the city has never before experienced the homeless situation that is occurring now.
Step-by-step explanation:
"Unprecedented" is an adjective used to refer to something that has never been done or seen before, something that has never happened before. When the speaker of the sentence says the "spread of street encampments" is unprecedented, what he/she means is that the city has never experienced this situation before, that it had never been this urgent or alarming. For that reason, the best option is letter A. that the city has never before experienced the homeless situation that is occurring now.