What change is necessary in lines 11 and 12?

• A. Change the question mark after valuable to a period.
• B. Change Chinese to chinese.
• C. Add a comma after hand-painted.
• D. Make no change.

Answer: (C)

The correct answer involves adding a comma after "hand-painted" to improve the clarity and readability of the sentence. In a list or series where multiple adjectives are used to describe a noun, clarity can often be enhanced with the use of commas. In this case, the term "hand-painted" is modifying a noun, and separating it with a comma from the next descriptive part can help clarify the structure of the sentence. This allows the reader to easily understand that "hand-painted" is one of several descriptors and maintains a consistent style throughout the writing.

Adding the comma serves a grammatical function that highlights the separate qualities being presented, ensuring the sentence flows better and is clearer in meaning.