Select the most appropriate meaning of the underlined idiom.
Some colleagues at a workplace are really hard nuts to crack.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. An inflexible person who is hard to convince.
The meaning of the idiom 'hard nuts to crack' is that it is difficult to do or to understand.
Hence, an inflexible person who is hard to convince is the correct answer.