Which convention notes the use of more noun-based phrases and content words and more subordinate clauses?

• A. Formal
• B. Objectivity
• C. Complexity
• D. Clarity

Answer: (C)

The main idea being tested is complexity in writing style. When a text relies on noun-based phrases and content words, and packs sentences with subordinate clauses, the sentences become longer and more layered. This growth in noun phrases and embedded clauses signals higher syntactic complexity, a hallmark of the convention being described. The other conventions focus on different aspects—formality concerns tone and politeness; objectivity is about staying unbiased; clarity aims for ease of understanding. So, the description best fits complexity.