Final answer:
The correct example of an idiom in the given options is: 'The map was difficult to read. We got lost.'
Step-by-step explanation:
An idiom is a phrase that has a figurative meaning different from its literal meaning. It is a type of expression that is unique to a particular language or culture. In the given options, the correct example of an idiom is option A: 'The map was difficult to read. We got lost.' This phrase uses the idiom 'got lost' to convey the idea that they were unable to find their way.
Learn more about Idioms in English