(II) A mountain, especially a high mountain, is frequently considered a mysterious place. The level of mysteryis often based on the degree of ___21__. The lower the degree of accessibility, the more mysterious it will be. Many people claim to have seen strange creatures, such as the North American Sasquatch and Himalayan Snowman, in hard-to-access mountains. Most of their tales seem incredible. Some even claim to have takenphotographs. But these photographs are often unclear; they usually include only ___22___ images of their so-called mysterious creatures. ____23___, these images may very well be a result of ___24___ compoundedby the viewers’ over-active imagination. ____25___, nobody has ever claimed to have seen these “snowmen”face to face.
21.
(A) incumbent
(B) irrigation
(C)abdication
(D) inaccessibility