He did his job with scrupulous care.

Answer: 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