Respuesta :
The function of the noun clause in this sentence is appositive. An apposititive occurs when a noun or word is followed by another noun or phrase that renames it or identifies it. In this case, the NP subject (Kam's choice) is renamed by the noun clause "that she read the assignment". In fact, that whole NP is the subject of the sentence ("Kam's choice, that she read the assignment").
The subject of the sentence, as I've said, is the NP "Kam's choice, that she read the assignment". The direct object is the personal pronoun "her" and the PP "for the test" is the I. O.
