Answer:
A.
"Lately, however, a bizarre problem has hit the city: it has become very
difficult to make change."
Step-by-step explanation:
The sentence "Lately, however, a bizarre problem has hit the city: it has become very difficult to make change," best describes the central idea of the passage. The sentence describes the problem the passage deals with. The other sentences and paragraphs of the passage help to flush out this central idea and to provide important supporting details.