Certified Professional in Accessibility Core Competencies (CPACC) Practice Exam 2025 - Free CPACC Practice Questions and Comprehensive Study Guide

Muteness, or the inability to speak, can be the result of various medical and developmental conditions that affect a person's ability to produce vocal sounds. Brain trauma, such as a traumatic brain injury or stroke, can directly impact the areas of the brain responsible for speech production and language processing. Additionally, conditions like Amyotrophic Lateral Sclerosis (ALS), which affect the neurological functions, can gradually impair the ability to speak as the disease progresses. These physical and neurological factors are significant contributors to muteness because they disrupt the biological mechanisms necessary for speech, making this option the best choice.

While genetic factors can play a role in various speech and language disorders, they do not directly cause muteness in the same way that brain trauma or degenerative diseases do. Environmental triggers and social anxiety might contribute to difficulties with communication, but they are not primary causes of muteness itself.