Answer:
A. The narrator thinks Jasper is foolish.
Step-by-step explanation:
The best that expresses the narrator's viewpoints towards Jasper is that "the narrator thinks Jasper is foolish".
From the excerpt, it is very clear that the narrator thinks Jasper is foolish. One is termed foolish is if he/she refuses to heed to warning. A foolish person is seen to be unwise and definitely lacks wisdom. Jasper displayed that because he was oblivious of the figure he cut out.
His foolishness is seen in his not making proper enquiries about the whereabouts of Thomas.
Therefore, Option A is the correct answer.