read the following excerpt from the article "vision, voice and the power of creation: an author speaks out," by t. a. barron and answer the question that follows:

right now, i am spending a lot of time listening to the voice of a particularly compelling character: the young merlin. in the end, i finally heard the voice of merlin to a surprising source: the haunting, mysterious hooting of a great horned owl outside the window of my colorado home. as i listened to that owl's resonant [echoing] call in the pre-dawn hours one morning, something about it gave me a whole new cadence [rhythm], a whole new sound. and then, a whole new voice.

which adjective supports the author's explicit message about his inspiration for merlin's voice?

a young
b mysterious
c new
d whole