The correct option is D makes
Adverbs modify verbs, adjectives and sometimes other adverbs in a sentence.
In this sentence, the verb 'makes' is getting modified by the adverb 'often'. It shows the frequency at which the person is making mistakes. Hence, Option B is correct.
Option A is incorrect as 'often' is the modifying adverb in this sentence.
Option C is incorrect as adverbs don't modify nouns.
Option D is obviously incorrect.