According to the research, the correct answer is Option A. Selective/elective mutism is the refusal to speak in one or more settings or situations, despite the ability to speak.
It is a permanent or temporary absence of language in a person who had previously acquired it.
In this sense, people who suffer from it remain silent in certain situations; the causes of this silence can be various and are activated voluntarily or as a consequence of a condition.
Therefore, we can conclude that according to the research, elective mutism is a disorder that occurs due to psychological causes that lead the subject to take refuge in muteness.
Learn more about elective mutism here: https://brainly.com/question/28240379
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