A. Really? B. Exactly. C. Possibly.

—Far too much money has been wasted repairing the old bridge.
—_______ We should save much more money.

A. Really? B. Exactly. C. Possibly.

I don’t know how to make a chioce. Could you please tell me which is correct answer? thank you .

They are all possible within different contexts.

C is the least likely.
B is the most likely.