Answer:
C). Adverbial phrase.
Step-by-step explanation:
An adverbial clause is described as a subordinate clause that functions as an adverb within the main clause. It functions as an adverb either to modify a verb, phrase, adjective, or even any other adverb.
The highlighted part of the sentence i.e. 'before the lawless court' demonstrates 'an adverbial clause.' It is beginning with subordinating conjunction 'before' which makes it a dependent clause and it acts as an adverb to describe the verb 'brought' by providing details about the place where the action took place. Thus, option c is the correct answer.