Both poems deal with the theme of ideas in the air that are related to the conflicts between belief systems related to romanticism. More or less it is the idea of common sense between spiritual and while Ode to a nightingale focuses on this, A slant of light speaks of oppression that's in the air and a fleeting sense of spiritual.
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To my mind, the correct answer is ( C ) It most likely takes practice to learn to use a ReWalk. Despite the fact that this device helps disabled people to have a more comfortable and normal life style, it seems that it takes practice to learn to use it. It can be inferred when the author describes how to use in the second paragraph. Besides, the author states that the device requires some effort from the person in order to make it function properly (3rd paragraph).
