The correct option is B Adverb of Place
The adverb 'everywhere' modifies the verb 'followed'. It answers the question where the action of following was being done. Hence, Option B - Adverb of Place is correct.
Option A is incorrect because the adverb 'everywhere' doesn't tell us anything about the time when the action was being done.
Option C is incorrect because the adverb doesn't tell us anything about the manner in which the action was being done.
Option D is incorrect because it doesn't speak anything about the frequency of the action.