What is the highlighted part of the following sentence who had been to the mansion before is called

Professor Plum, (who had been to the mansion before,) expertly navigated the maze of rooms and corridors to reach the conservatory.

a.prepositional phrase.
b.appostive.
c.conjunctive adverb.
d.indirect object

Respuesta :

The correct answer for this would be option B. Based on the given sentence above, the highlighted part of the sentence which is "who had been to the mansion before," is called an appositive phrase. This is considered as an appositive phrase because it renames or describes the noun next to it. Hope this helps.
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