We must remove the subject and verb of one clause and place it between commas to combine the sentences so that they each have an appositive
An appositive is basically a noun, noun phrase or pronoun whose purpose is to provide more information about another noun or noun phrase in the sentence.
In order to transform clauses into appositives, we must drop the subject and the verb from them. Let's use clauses from the question to see how we can do that:
Both clauses are about Anna, which means we can eliminate the repetition by dropping "Anna is" from the second clause. Then, we place what is left between commas after "Anna" in the first clause:
With the information above in mind, we can conclude that the answers given above are correct.
Learn more about appositives here:
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