4. Which sentence combines the two sentences using an adjective clause that
functions as part of the subject?
A The Chinese began using flags more than 3,000 years ago, and they
made flags from silk.
B The Chinese used flags, made with silk over 3,000 years ago.
C The Chinese, who made flags from silk, began using them more than
3,000 years ago.
D Making flags from silk, the Chinese began using flags more than 3,000
years ago.