6877. He did his job with scrupulous care.

✅ The correct answer is option D.
Exact : not approximated in any way; precise.

Marvellous : causing great wonder; extraordinary.

Great : of an extent, amount, or intensity considerably above average.

Attentive : paying close attention to something.

Scrupulous : (of a person or process) careful, thorough, and extremely attentive to details.

Synonym of Scrupulous is Attentive