I found this same question and the bolded words were OF MYSTERIES.
Choices given were:
a) adjective phrase
<span>b) appositive phrase </span>
<span>c) adverb phrase </span>
<span>d) participle phrase
</span>
The phrase OF MYSTERIES is an A) ADJECTIVE PHRASE. It describes the term writer.
You would need to find the vertex. So your answer would be (-1,-3)
Answer:
The long-term relationships between agencies, congressional committees, and interest groups in specific policy areas.
Explanation: