The kinds of phrases involved in the sentence:
c). Verb phrase
d). Adverbial phrase
A verb phrase is defined as the phrase that involves the main verb along with its auxiliaries(which could be either one or more than that).
While an adverbial phrase is described as a phrase that plays the role of an adverb in order to revise the verb or adjective.
In the given sentence, "has been advocating" is the verb phrase, and "for social justice" is the adverbial phrase functioning to revise the verb.
Thus, options c and d are the correct answers.
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