Answer: The right answer is the B) Change devote to devotion.
Explanation: Just to elaborate a little on the answer, it can be added that devote is a verb, and what this part of the sentence requires is a noun, which acts as direct object—what does Jeremy demonstrates? (great devotion). The other options are incorrect, since they replace correct usage of words with incorrect ones. Jeremy is the subject, and verbs, and not nouns, must indicate the actions that he is doing: he demonstrates, he performs, and he attends.