Answer: adjective
Explanation:
The word class that the word in bracket underlined word in the sentence belong to is the adjective.
The adjective is used to modify a noun and give more information about it. Special as used in the sentence means that the pen or brush us used for something different and particularly designed for a unique purpose.
What would be the question exactly?
B
Explanation: None of the other answers logically follow the order of events and do not sound as fluid as B
Let me know if it is correct
Free (someone or something) from a constraint or difficulty
I haven’t read it, she said.