The idiom "cut corners" means:

Explanation

The correct answer is Option A: 'To reduce expenses or effort carelessly.' This idiom is commonly used to describe situations where someone opts for a cheaper or easier method that sacrifices quality or thoroughness. For example, a contractor might 'cut corners' by using lower-quality materials to save money, resulting in inferior work.Options B, C, and D are incorrect because they do not capture the essence of the idiom. Option B refers to a literal shortcut, which does not imply a compromise in quality. Option C implies trickery, which is unrelated to the idiomatic context. Lastly, Option D refers to calculation errors, which also does not align with the idea of reducing effort or taking shortcuts in a careless manner.