Which sentence best describes the main idea of the news story? A.
"Lately, however, a bizarre problem has hit the city: it has become very
difficult to make change."
B. "A quick walk through any of the shopping districts of Buenos Aires will
show the casual visitor many "No Coins" signs in storefront windows."
C.
"If you hope to visit this beautiful, up-and-coming city soon, don't let the
great Buenos Aires coin shortage stop you."
D.
"You do need to plan to spend extra time locating coins for many of your
simpler purchases and exchanges."