Final answer:
The McGurk Effect shows that speech perception is a multisensory process that combines auditory and visual information, making option B the correct answer.
Step-by-step explanation:
The correct answer regarding the McGurk Effect is: B. Our perception of speech relies on various sources of information like the shapes our lips make when speaking and what we are hearing. The McGurk Effect demonstrates that our auditory perception is influenced by visual stimuli. Our brains integrate both auditory and visual information when interpreting speech. For instance, when the movement of a speaker's lips does not match the sound produced, our perception may change, leading to hearing a different sound than what is actually spoken. This phenomenon indicates that our speech perception is not solely based on what we hear but is a multisensory process. Therefore, choices A and D are incorrect because they underestimate the influence of visual stimuli on our auditory perception, and C is incorrect as it implies the brain chooses one type of information over the other, rather than integrating both.