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Review: Identifying Clauses, Answer 9.2

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because of the coat that I bought in the West Edmonton Mall
The answer phrase is correct.
You might have thought that this is a clause because it contains the subject I and the verb bought, but this phrase does not express a complete thought. This phrase has no true subject or predicate. It consists of the conjunction because followed by the prepositional phrase of the coat (that I) bought in the West Edmonton Mall.