Based on the options given, the most likely answer to this query isC) Some of the heirloom quilts are marvels which still exist of design and stitching.
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The type of subordinate clause is an adjective clause.
The answer is C. He hopes that Duncan will wake and prevent the murder
D, he is smart but he does not want the others to tease him. I guess he does not want them to think he is a nerd.