Correct Answer:
C. An impracticable wish
The idiom "A pipe dream" signifies an impracticable wish or an unrealistic hope. It refers to a fantasy or an idea that is unlikely to ever happen. The other options do not convey this sense of impossibility.
The idiom "A pipe dream" signifies an impracticable wish or an unrealistic hope. It refers to a fantasy or an idea that is unlikely to ever happen. The other options do not convey this sense of impossibility.