8 The blind was down and the room dim. He caught a glimpse of a most singular thing, what seemed a handless arm waving towards him, and a face of three huge indeterminate spots on white, very like the face of a pale pansy. Then he was struck violently in the chest, hurled back, and the door slammed in his face and locked. It was so rapid that it gave him no time to observe. A waving of indecipherable shapes, a blow, and a concussion. There he stood on the dark little landing, wondering what it might be that he had seen. Which is the BEST meaning for the word indeterminate as it is used in paragraph eight?
A) not beautiful
B) easy to identify
C) not very large in size
D) unable to be identified