Multiple choice general knowledge

I think I understand the nuts and _____ of the operation.

  1. screws

  2. hammer

  3. nails

  4. bolts
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The idiom 'nuts and bolts' refers to the basic working parts or essential details of something. Just as nuts and bolts hold machinery together, these details hold an operation together. 'Screws,' 'hammer,' and 'nails' don't complete this common expression.

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