Final answer:
The best synonym for "inspection" is "scrutiny" as both terms suggest a careful and detailed examination.
Step-by-step explanation:
The best synonym for "inspection" is D) Scrutiny. Inspection refers to the act of examining something closely and thoroughly. When inspecting, one often scrutinizes the item, which means to examine or observe with great care and in detail.
Thus, both "inspection" and "scrutiny" imply a careful and detailed examination. In contrast, "examination" could be used for less detailed reviews, "exploration" is more about discovering or researching something new, and "observation" is about noting or perceiving without the necessity for detailed examination.