Correct Option: D

worsen (Verb) : to make or become worse than it was before
ameliorated (Verb) : to make something better
improve (verb) : to make/ become better than before
depend (Verb) : to rely and be able to trust; to be sure and expect that something will happen
soften (Verb) : to make or become softer, less bright, rough or strong; to become or make more sympathetic and less severe or critical