The author explicitly says that spirit can be found in the voice of a character. Explicitly means directly - so it means that the author didn't hide the fact that he knew what could be found in the voice.
Correct option is A.
The phrase that explicitly states the author's attitude about voice is that " It is the trickiest door to open."
This is an explicit statement because the writer is directly making a connection and telling the reader information. He is directly stating that if the author can hear the voice of his character the reader will also be able to hear that voice.
<span>Which is not tomb enough and continent To hide the slain?—O, from this time forth, My thoughts be bloody, or be nothing worth! (Hamlet, act IV, scene IV)</span>
