Spring is _. It will be warmer soon.

Explanation

Option A; 'on the way' is used to talk about events/things that are about to happen. Option B: the use of 'to be' is inappropraite as the sentence already as a helping verb 'is' .Option C: 'eventually' means in the end, especially after a long delay, dispute, or series of problems."Eventually, after midnight, I arrived at the hotel"Option D: 'prepared now' means made ready for use."He paints over the prepared canvas with brown acrylic to bring out the cracks"