The candidate's expedition was ___________ for its brevity and clarity.

Correct option is C

The correct option to fill in the blank is (c) remarkable.

Explanation: The sentence emphasizes the positive attributes of the candidate's expedition, specifically its brevity and clarity. The word "remarkable" fits best as it signifies something that is worthy of notice or admiration.

Grammatical rule used:
Adjectives are used to describe the qualities of nouns, and "remarkable" appropriately highlights the distinguished qualities of brevity and clarity.

Meanings of the other options:

• Incomprehensible: (असमझनीय) Something that cannot be understood, contradicting the context of clarity.
• Conspicuous: (स्पष्ट) Easily noticeable, which does not specifically convey admiration for brevity and clarity.
• Complimentary: (प्रशंसात्मक) Expressing praise, which does not directly fit as an adjective for the expedition itself.

Correct Sentence: The candidate's expedition was remarkable for its brevity and clarity.