Camden Is Performing an In-Class Demonstration Directed by His Professor

Camden is performing an in-class demonstration directed by his professor.Camden is asked to close one eye and focus on his pencil with the other.Then he is asked to slowly move the pencil closer to his open eye.To Camden's amazement,for a brief instant the pencil seems to disappear.What has likely occurred?

A) Camden temporarily looked away from the pencil.
B) His professor briefly covered the pencil up when Camden was distracted.
C) The pencil temporarily passed through Camden's blind spot.
D) Camden experienced temporary color blindness.