The thesis statement in the introduction to the essay (quoted below) contains several mistakes related to formality. Which of the options below reflects all the cases of informality in this sentence? You may use your workbook or the internet to look up the terms used in the options if you do not know what they mean.

"I'm convinced that learners can really benefit a lot from a creative teaching approach and that it can have a huge impact on learners enjoyment of learning."          

 A. The use of a contraction, the use of a first person pronoun, the use of informal vocabulary.
 B. The use of a contraction, the use of hedging, unnecessary wordiness.
 C. The use of a first person pronoun, the use of slang, the absence of hedging.
 D. The use of the passive voice, the use of informal vocabulary, unnecessary wordiness.